Three injured when pilot boat impacts LNG carrier
JULY 14, 2016 — The U.K.’s Port of Milford Haven is continuing to investigate an incident occurred that occurred early Sunday morning, July 10, when its pilot vessel St Davids made hard
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Cornelia operator cops plea, will pay $1 million
JULY 6, 2016 — Schnaittenbach, Germany, headquartered Mineralien Schiffahrt Spedition und Transport GmbH (MST), operator of the M/V Cornelia, will pay penalties totaling $1 million after yesterday pleaded guilty in U.S. District
Ulstein delivers X-Stern wind farm SOV
JUNE 23, 2016 — Bernard Schulte Offshore today took delivery of the first of two 88 m x 18 m wind farm service operation vessels ordered from Norway’s Ulstein Verft in 2015.
Tugs & Barges: Evolving with the market
Engineering company GTT has more than 50 years’ experience in the design of membrane cargo containment systems, but one project underway right now in Orange, TX, is quite unique. That’s because it’s the first Liquefied Natural Gas (LNG) bunker transport barge in the United States.
One of 118 GTT projects currently underway worldwide, the tank barge is taking shape at Conrad Orange shipyard, Aziz Bamik, General Manager of GTT North America, told delegates at Marine Log Tugs & Barges 2016 Conference & Expo held last month in Seattle. While Conrad has decades of experience building all types of tank barges—dirty oil, products, chemicals, and LPG—this is the first time that it is building a vessel with one of GTT’s Mark III Flex membrane tank technology. Following a certification process, Conrad signed a license agreement with GTT back in January 2015 to construct the Mark III Flex.
Designed to operate in inland waterways, bays, harbors, and U.S. coastal waters, the new 2,200 m3 tank barge will be used to refuel TOTE’s two 3,100-TEU LNG-powered containerships. The barge will travel about a mile from its mooring facility to fuel the two Orca Class containerships, which operate out of the Port of Jacksonville, FL to San Juan, PR. The barge is designed not as an Articulated Tug Barge unit, but rather to be towed by hawser wire, pushed or maneuvered by hip, says Bamik.
In anticipation of increasing demand for LNG as a marine fuel, Bamik also mentioned to the conference audience that GTT North America was working with Conrad on a larger Articulated Tug Barge unit that will have a capacity of 4,800 m3, with two GTT Mark III Flex Cargo Containment System tanks. The 319 ft x 62 ft barge would have cold LNG delivery with onboard reliquefaction.
COMING DEMAND FOR LNG
The interest in LNG as a marine fuel seems to have waned in the U.S. with the drop in the price of oil. As of today, five vessels burn LNG as fuel in the Jones Act market. Besides TOTE’s two containerships, the Harvey Power, the third in a series of six dual fuel Platform Supply Vessels for Harvey Gulf International Marine, New Orleans, recently entered service in the Gulf of Mexico under charter for Shell. Next year, Crowley Maritime will take delivery of two Commitment Class Container Roll-on/Roll-Off (CONRO) ships for Puerto Rico. Those are being classed by DNV GL. All the other Jones Act LNG fuelled vessels are being built to ABS class.
Additional LNG Ready classed tonnage delivered or being built by General Dynamics NASSCO in San Diego and Philly Shipyard Inc. in Philadelphia could grow the LNG-fueled Jones Act fleet if converted in the future. TOTE is also converting its two Orcas Class RO/RO ships for Alaska service in Singapore.
Globally, there are about 77 gas-fueled vessels in operation and another 79 confirmed newbuildings as of March 2016, according to Anthony Teo, Technology and LNG Business Development Manager, North America, DNV GL. “There are about another 50 LNG Ready vessels have been contracted,” Teo told delegates. He said that DNV GL estimates there will be 360 LNG fuelled vessels in operation by 2020.
The widespread adoption of LNG as a fuel, Teo pointed out, was is being hindered by the lack of gas fuel bunkering facilities in ports.
A panel of naval architects, liquefied natural gas reliquefaction technology providers, and regulators discussed more in-depth the current hurdles hindering the expansion of the adoption of LNG as a marine fuel for the tugs and towboats in the Jones Act market.
Panelist Rafael Riva, Marine Business Development Manager, ECA, Lloyd’s Register pointed out that the technology was well proven in Europe. The first LNG tugs, for example, were built in Turkish shipyard Sanmar for Norway’s Bukser og Berging AS and have been in service for Statoil AS since 2014. The DNV GL class tugs are equipped with lean burn gas engines from Rolls-Royce and Rolls-Royce azimuthing thrusters.
The LNG powered propulsion systems does require more space. The Shearer Group’s Engineering Manager Joshua Sebastian, PE, mentioned the complexities of integrating the necessary fuel tank, piping, and control systems required to burn LNG on the smaller towboat platform. Sebastian’s company, naval architectural firm The Shearer Group, has been contracted for the conversion of a 65-foot-long conventional diesel-powered towboat to burn LNG.
LNG-powered tugs also require small volumes of fuel with a dedicated delivery solution. Fueling can be accomplished either via tanker trucks, shore LNG storage tanks, portable gas fuel tanks or ship to ship or barge to ship transfer.
Panelist John Dwyer, Officer in Charge, Marine Inspection/Chief, Inspection Division at USCG Sector Puget Sound, provided the regulatory view on the development of LNG as a marine fuel in the U.S.
The U.S. Coast Guard has issued a number of policy letters and guidance on the design and operation of ships using LNG as a marine fuel, as well as ships and facilities transferring LNG as fuel. The U.S. Coast Guard has addressed designs and facilities on a case-by-case basis.
Waller Marine’s Beau Berthelot pointed out that his company has worked on a number of refueling solutions. Waller Marine, for example, has been granted an Agreement in Principle (AIP) by ABS for a new liquefied natural gas (LNG) and regasification articulated tug barge concept. The vessel has the ability to load LNG from existing LNG terminals, liquefaction facilities or traditional LNG carriers and transport the LNG to existing tanks, traditional LNG carriers, trucks or marine vessels using LNG as a fuel. The barge also is equipped for regasification of LNG directly to a pipeline or to a power plant. An additional feature will be the use of natural gas as a fuel in the dual fuel engines of the tug to drive the tug-barge unit.
The benefit of the LNG Articulated Tug and Barge Regas Vessel (ATB RV) is that it allows LNG to be moved and delivered more efficiently on a small-scale basis in locations where large LNG infrastructure would be cumbersome, costly and time consuming.
Another possible solution for small footprint applications mentioned by panelists David Grucza, Director, Drilling and Marine U.S., Siemens, and Michael Walhof, Sales Director, Distributed LNG Solutions, Dresser-Rand, a Siemens company, was Dresser-Rand’s LNGo system is a modularized, portable natural gas liquefaction plant. This point-of-use production plant is a standardized product made up of four packaged skids: a power module, compressor module, process module and a conditioning module. The natural gas consumed powers the unit and is also used as the process refrigerant to eliminate complexity and maintenance.
SHIPYARDS CONTINUE TO BE BUSY
Meanwhile, U.S. shipyards continue to book orders for conventionally powered harbor tugs and Articulated Tug Barge (ATB) units. The continued orders for ATBs, in particular, are in response to transport refined products in the U.S.
Just last month, Gunderson Marine, Portland, OR, secured an order to build two 82,000 bbl, 430 foot-long oceangoing tank barges for Harley Marine Services, Inc., Seattle. The tank barges will be part of an ATB unit.
Gunderson last built a barge for Harley Marine in 2009. Construction on the barges will begin this year, with delivery of both vessels set for the second half of 2017.
As of press time, Harley Marine Services was negotiating with a Gulf Coast shipyard for the construction of the ATB tugs that would be coupled to the tank barges being built by Gunderson.
Over the past nine months, Gunderson Marine has delivered two 578 ft ATB oceangoing barges for chemical and oil service for Kirby Offshore Marine.
For its tank barges, Kirby Offshore Marine took delivery of two 10,000 hp ATB tugs from Nichols Brothers Boat Builders, Whidbey Island, WA. Speaking at Marine Log Tugs & Barges 2016, Nichols Brothers Boat Builders President & CEO Gavin Higgins said that ATBs enjoy several cost advantages over coastal tankers when it comes to moving refined products. Crew costs are far less, nine crew vs. 18 crew. Additionally, ATBs are more ship shape, offering speed advantages over towed tank barges.
The shipyard has also signed a contract with Kirby for two line haul tugs, as well as two 8,000 hp ATB tugs based on a design by naval architect Robert Hill of Ocean Tug & Barge Engineering. The companion tank barges are being built by Vigor.
FINCANTIERI BAY SHIPBUILDING
Fincantieri Marine Group’s Fincantieri Bay Shipbuilding (FBS), Sturgeon Bay, WI, has delivered the Articulated Tug Barge unit (ATB) Barbara Carol Ann Moran and the 110,000-barrel ocean tank barge Louisiana to Moran Towing Corporation, New Canaan, CT.
The 5,300-HP, 121-foot ATB tug Barbara Carol Ann Moran is certified ABS Class +A-1 Towing Service, +AMS, and is equipped with state-of-the-art navigation and communications technology. The Louisiana is 468 ft x 78 ft.
The ATB unit will work the East Coast of the United States and the Gulf of Mexico.
This is the shipyard’s third delivery to Moran under a 2014 contract, with a tank barge delivered in May of 2015, and another ATB—the tug Leigh Ann Moran and tank barge Mississippi—delivered December 1, 2015.
VANE BROTHERS SERIES AT ST. JOHNS
Vane Brothers, Baltimore, MD, continues to invest in new tonnage. It has a long running newbuild program at Chesapeake Shipbuilding in Salisbury, MD, where it is constructing a series of 3,000 hp ATB tugs and has now added the second of eight 4,200 horsepower tugboats from St. Johns Ship Building, Palatka, FL.
The new tug, Hudson, is the second of Vane’s Elizabeth Anne Class, under construction at St. Johns Ship Building. Lead vessel of the class, the Elizabeth Anne, was delivered in January, while the third in the series, the Baltimore, is set for completion this summer.
The new tug will be paired with the Double Skin 601, the first in a new series of 55,000 bbl barges and will be followed later this year by the Double Skin 602, both built by the Conrad Deepwater South Shipyard in Amelia, LA.
“Our ongoing fleet construction program ensures that we have state-of-the-art equipment available to service all of our customers’ needs with the utmost safety and efficiency,” says Vane Brothers President C. Duff Hughes.
Designed by Frank Basile, P.E., of Entech Designs, LLC, Vane Brothers’ Elizabeth Anne Class tugboats are close cousins to the Basile-designed Patapsco Class tugboats, 15 of which were produced between 2004 and 2009.
Measuring 100 feet long and 34 feet wide, with a hull depth of 15 feet, the model bow Hudson is powered by two Caterpillar 3516 Tier 3 engines, each generating 2,100 horsepower at 1,600 rev/min. Two John Deere PowerTech 4045, 99 kW generators deliver service power to the boat, while a third John Deere 4045 teamed with an Allison transmission drives the chain-driven Intercon DD200 towing winch. The Elizabeth Anne also has Reintjes marine gears supplied by Karl Senner, LLC, Kenner, LA.
The Hudson features the latest in solid-state, Simrad electronics and handsomely appointed, mahogany upper and lower pilothouses, as well as spacious accommodations for up to seven crew members.
Meanwhile, the Double Skin 601 is configured and outfitted in a nearly identical fashion to the most recent 55,000 bbl Vane Brothers barges that were delivered in 2015 by Indiana-based Jeffboat Shipyard. Like them, the Double Skin 601 is equipped with an 8,600 BTU thermal fluid heating system, vapor control system and cargo tanks coated with International Interline 994 Epoxy Novolac. However, the Double Skin 601 has a raised forecastle bow design, which provides additional reserve buoyancy.
The DS-601 and its sister, the DS-602, are both fitted with two fixed boom pedestal cranes each, Model F1-65, with a 65-foot boom length supplied by Techcrane International, Covington, LA.
Primarily tasked with towing petroleum barges engaged in the North Atlantic coastwise trade, the Hudson has joined the Elizabeth Anne among more than 20 vessels that are part of Vane’s Delta Fleet, based in Philadelphia. The DS-601 is also a new Delta Fleet member.
NEW TUG FOR SEA VISTA
In early April, BAE Systems Southeast Shipyards, Mobile, AL, launched the first of two 12,000 hp ATB tugs for Sea-Vista ATB, LLC.
One of the interesting features of the tug M/V Sea Power is that it has two independently controlled and operated hydro-dynamic Van der Velden Barke rudders. Independent Proportional Steering will allow the rudders to be actuated either independently or synchronized. The rudders were supplied by Dutch company Van der Velden Marine Systems (VDVMS) in conjunction with its U.S. representative Ships Machinery International, Inc. (SMI).
Van der Velden says that tank tests showed that rudder design was extremely effective for this type of vessel. This ATB tug will have enhanced maneuverability and excellent course keeping stability. The efficiency provided by this high technology rudder solution will result in significant savings over the life of the vessel.
The 43m x 14m ATB tug, with a draft of 6.75m, is designed by Seattle-based Guido Perla and Associates, Inc. (GPA). The tug’s power is supplied by two 4,640 kW main engines and three 250 kW main generators, with a standby emergency generator of 150 kW. The vessel uses a pin connector system between the tug and the barge and fully complies with ABS Under 90 m Rules, Maltese Cross A1 AMS ACCU Towing Vessel, SOLAS, USCG Subchapter I.
“We are pleased that our client selected this state of the art rudder system for their new vessel,” said SMI Vice President Arthur Dewey, and “we are confident that their faith in Van der Velden rudders will be rewarded over the long haul.” Van der Velden reports that the Sea Power is the only vessel of its kind in the U.S. at present time.
The tug will have exceptional maneuverability, with two independently controlled and operated hydrodynamic Van der Velden Barke rudders. Independent Proportional Steering will allow the rudders to be actuated either independently or synchronized.
Van der Velden has done a lot of work to facilitate the installation of these rudders into a hull and worked closely with Guido Perla Associates Inc. and BAE Systems to assure a smooth transition from initial design to final installation.
GPAI Chairman Guido Perla commented, “Van der Velden provided excellent technical support and on time delivery of design documents that helped us develop the engineering and design for the installation of their steering system. Their coordination with our staff was prompt and to the point. We appreciated their support.”
Van der Velden says that the key driver behind the Barke rudder is its innovative and sophisticated progressive high lift design, offering unsurpassed maneuvering and course-keeping performance, as well as smooth operational comfort. The progressively operating flap linkage system is contained in a fully enclosed, grease-lubricated Barke housing. This results in minimum wear on the linkage components and eliminates the problems caused by contact with floating objects.
Another set of Barke high-lift rudders will be installed on a second ATB tug before this summer.
BARGE FOR PROVPORT
Conrad Shipyard, Amelia, LA, recently delivered a 300-foot long x 72-foot wide rake/box barge with a deck rating of over 6,000 pounds per square foot to ProvPort, Providence, RI, according to naval architect JMS Naval Architects, Mystic, CT. The crane barge design allows for the easy loading and unloading of cargo from ships to the dock or from ship to ship.
JMS Naval Architects, Mystic, CT, engineered and designed the crane barge for the State of Rhode Island that will be used for stevedoring operations at ProvPort Inc.
ProvPort is a nonprofit public-private partnership, formed in 1994, which owns and operates the municipal port of the City of Providence, RI. ProvPort is New England’s premier deep-water multimodal facility for international trade and domestic distribution and one of the busiest ports in America’s northeast.
JMS designed the barge to carry and operate the facility’s 440-ton Liebherr LHM 550 mobile harbor cranes. The barge is ABS classed A1 with notation “Deck Barge,” uninspected and unmanned. JMS also created the technical specification documents to utilize for the solicitation of shipyard bids and provided owner’s representative services during the construction of the barge at Conrad Industries.
The contract was funded by the State of Rhode Island’s Transportation Investments Generating Economic Recovery (TIGER) II grant program award managed by the Rhode Island Commerce Corporation. The grant was created by Congress in the 2010 Transportation Appropriations Act and allowed the purchase and installation of the barge and two high performance harbor cranes. The new stevedoring equipment will modernize and enhance the port’s ability to continue its existing bulk material operations while expanding its capabilities to accommodate container operations; thus alleviating demand on the Port of Boston—the only existing container port in New England. The new crane barge will be critical for the port which has relied on 30-year-old rented crane barges that have been prone to breakdowns and have been out service for prolonged periods. The crane barges are estimated to remove on average 1,000 trucks per week off the northeast corridor highway system—one of the most congested in the country.
NEW HARBOR TUGS FOR BAYDELTA, MCALLISTER
Jensen Maritime, Seattle, is designing tractor tugs for both U.S. East Coast and West operators. One is for Vessel Chartering LLC, a wholly owned dividsion of BayDelta Navigation. The new tug is powered by a pair of 3,385-horsepower Caterpillar 3516 EPA Tier 4 engines and is the third tugboat designed by Jensen Maritime with engines meeting EPA Tier 4 requirement.
The tug was designed without ballast tanks, eliminating the need for ballast water discharge and therefore ballast water treatment systems. To maintain proper trim, the vessel will transfer fuel, as necessary.
The tug is being built by JT Marine Inc. shipyard in Vancouver, WA, for delivery in second quarter 2017.
Jointly developed by Vessel Chartering and Jensen, the 110-ft x 40 ft tug has the ship assist and escort capabilities of smaller harbor tugs, while delivering the improved towing performance and increased range of larger ocean-going tugs.
The design offers the flexibility to support ship escorts, assists and towing, with the escort capability being enhanced to provide support for assisting the large, 18,000 TEU containerships expected to make an increasing number of West Coast port calls.
With an electrically powered, double drum tow winch aft by Rapp USA and an electrically powered hawser winch forward by Markey Machinery as deck machinery, the vessel will be capable of a 93-to-95 short-ton bollard pull. Both winches’ electrical power will remove any chance of a hydraulic oil spill on deck.
The tug is designed to carry up to 123,000 gallons of fuel, 4,300 gallons of fresh water, and up to 4,500 gallons of urea, which is used in the main engine exhaust Selective Catalyst Reduction (SCR) treatment system used to meet EPA Tier 4 emissions requirements.
On the East Coast, McAllister Towing, New York, NY, has contracted with Horizon Shipbuilding, Inc., Bayou La Batre, AL, to build it two new 100 ft x 40 ft new escort tugs.
The tugs will be powered by 3516E EPA Tier 4-compliant Caterpillar engines with Schottel SRP4000FP propulsion units producing 6,770 hp and 80 metric tons bollard pull.
The tugs will be the 31st and 32nd tractors and the first Tier IV tugs in McAllister’s fleet.
They will be ABS classed Maltese Cross A-1 Towing, Escort Service, FiFi 1 and Maltese Cross AMS.
The hull has been designed by Jensen Maritime for enhanced ship docking abilities in addition to direct and indirect escorting and the tugs have been designed and simulator tested to assist new Post-Panamax and Ultra-Large Vessels.
Towing machinery will include a Markey asymmetric render-recover winch on the bow and a Markey tow winch with a spool capacity of 2,500 ft of 2¼ in wire on the stern.
MARCON BROKER FOR NEW DESIGN TUG
Purple Water Ltd. has appointed Marcon International, Inc., Coupeville, WA, as exclusive broker to handle the shipyard licensing for construction of an innovative new tug in the Americas.
Called the Giano tug, the compact double-ended tug has a high displacement tunnel hull form, two large structural keels and a straight-line controllable pitch thruster configuration designed and built solely for ship handing.
With intuitive in-line handling controls, the tug can produce 55 tonnes (70 tonnes) of bollard thrust and pull in all directions at full power with true 360 degree maneuverability, while maintaining a 0 degree list – plus a side-stepping speed of 7 knots – from full ahead to full speed sideways in 10 seconds.
The tug works equally well from the bow or stern and is fitted with 75 tonne escort winches fore and aft.
The design is claimed to has the highest stability numbers of any escort tug afloat, not only in its own 24 m compact class, but also compared with the 32 m escort terminal class.
Two separate engine rooms, a separate generator room and a double hull with integral “W” heavy duty fendering and patented underwater fenders provide a high level of safety, and allow the tug the unique capacity to side thrust and push at full power without listing, while assisting vessels in confined spaces
The Gianotug design is patented over 40 countries.
After four years of research and development, the first tug of this class, is now available in Italy for shipowners and shipyards interested in licensing and building the design to inspect and experience a “hands-on” demonstration of the tug’s capabilities.
Built by Chinese shipbuilder Guangdong Bonny Fair Heavy Industry, the 25.75 m x 13.02 m x 5.20 m depth / 5.30 m Giano is powered by twin 1,678 kW CAT 3512C-HD diesels developing a total power of 4,562 HP at 1,800 RPM.
A Schottel SRP-3000 azimuthing drive with a controllable pitch prop is mounted in a straight line at each end, with the tunnel hull specifically designed to eliminate propeller interference.
Topside access and ultra-short shaft lines allow for main engine removal in a few hours.
The U.K. flagged Giano is classed LR +100A1, Escort Tug, FiFi-1 (2,400 cu.m/h) with water spray, Unrestricted – MCA WB Area 1 (up to 150 miles from safe haven). While this first vessel has a 55 tonnes bollard pull, the unified design allows for both 55 tonnes and 70 tonnes bollard pull versions to be built.
A return to its maritime roots
“Anyone studying the growth of the city …cannot help but be struck by the fact that New York was first a port before it was anything else.” This William Bixby quote adorns the perimeter of South Street Seaport in New York. The city is one with a rich maritime history—operations on both the East and Hudson River have played a vital role in shaping the city and its people’s history—but its one often forgotten by most New Yorkers navigating their way through the hustle and bustle of the concrete jungle.
New York was originally the landmass south of Wall Street on the island of Manhattan, as time went on, however, New Yorkers began expanding out into the neighboring boroughs and eventually made their way to the suburbs. Today, Manhattan is still the city’s center with New Yorkers spending, on average, 40 minutes traveling to or from work each day, according to the New York Times —more than any other city in the United States. But one mode of transportation often not used by New Yorkers, are ferries operating on New York’s marine highway, the East River. Granted, most communities in the city’s five boroughs don’t have access to such ferry operations—except for Staten Island which has the government operated Staten Island Ferry, most ferry operations are private and confined to Manhattan and parts of Queens and Brooklyn—but that’s all about to change thanks to a partnership between the New York City Economic Development Corporation (NYCEDC) and Hornblower, Inc.
Hornblower is no stranger to New York, the company’s subsidiary Statue Cruises currently provides transportation to the Statue of Liberty National Monument and Ellis Island. Hornblower also debuted its New York Hornblower Hybrid, a ferry/luxury yacht, back in 2011.
Citywide Ferry
Promising a fast, frequent and convenient service operating year round, the Citywide Ferry will bring a total of six routes that, when combined, will cover over 60 miles of waterways. The creation of the service will help meet growing waterfront community demand, and help lighten the load for an already overworked, overcrowded, and outdated MTA subway system.
Hornblower will have the option to purchase at least 17 new ferries, as well as chartering already existing ferries to help meet the system’s demand. Our sources tell us Hornblower will likely contract up to three shipyards, which will each build three to four ferries in the first round of construction. One of the shipyards is believed to be Metal Shark Aluminum Boats, Jeanerette, LA. It recently received a Small Shipyard Grant from the Maritime Administration for its Franklin, LA, shipyard.
The city is providing the service with $55 million in infrastructure upgrades—this includes the building of ten new ferry landings and the repair/refitting of six others. Additionally, the city will provide $10 million for startup costs, such as vessel upgrades and ticketing machines and $30 million in operation support per year for a period of six years.
NY Waterway’s East River Ferry boats are also to be fully integrated into the Citywide Ferry fleet. The transition is expected to be complete by the summer of 2017.
The Citywide Ferry service will roll out in two phases. Phase one will initiate service to Astoria, South Brooklyn and Rockaway in 2017. Phase two to Soundview (Bronx) and Lower East Side will launch in 2018.
The catamaran ferries, which will be based on an Incat Crowther design, say our sources, will carry at least 149 passengers, will be fully accessible to those with disabilities, will be equipped with WiFi, and will operate using low emission engines and “Low Wake” technology. The ferries will offer passengers 360 degree views, and LED screens will be fitted on board displaying information and entertainment.
The ferries, like its Staten Island ferry counterpart, will also offer food and beverage options on board.
However, unlike the Staten Island Ferry, which is free, the Citywide Ferry will cost passengers $2.75, the same price as a New York City Metro Card swipe on the city busses or Subway system.
Passengers however will not be able to transfer from the train/bus to the Citywide Ferry—meaning the service won’t be fully integrated with the NYC mass transit system. However, free transfers will be available between ferries. The ferries will operate from 6:30 am to 10 pm, seven days a week.
Ferry Landings for Citywide Ferry
A total of 10 ferry landings—the barges were designed by Blancke Marine Services, Woodbury, NJ, and the topside outfit by project design manager McLaren Engineering—will be built for the service, and are expected to be ready in time for the service’s launch in 2017. The barges for the landings are being built at May Ship Repair on Staten Island.The ferry landings will be 35 ft wide by 90 ft long.
The landings are being fabricated for Soundview, Bronx; Astoria, Queens; East 62nd Street, Manhattan; Roosevelt Island (between Manhattan and Queens); Long Island City, Queens; Stuyvesant Cove in Manhattan; Grand Street (Lower East Side Manhattan); Red Hook, Brooklyn; Bay Ridge, Brooklyn; and the Rockaways.
According to NYCEDC, upon completion, the landings will be equipped with canopies and wide screens to provide passengers a sheltered space from inclement weather. Additionally, the barges will feature ticket machines and waiting areas, allowing for minimal upload impact at the landing sites, says the NYCEDC.
Helping the waterfront community
The Citywide Ferry system is projected to add 155 new jobs to the New York Harbor. Additionally, the company will participate in the City’s HireNYC program which will match qualified applicants from neighborhood-based WorkForce1 training centers, meaning that the folks working at the landings will be qualified people from the communities.
Crews are expected earn more than $15 an hour and will also receive a comprehensive benefits package.
Further exemplifying its desire to highlight and foster the growth of the city’s maritime tradition, NYCEDC has partnered with a number of federal, state and city agencies to launch the Waterfront Navigator—a website that will serve as an official source of information for businesses and waterfront property owners seeking to learn what tools are available to them. In addition, the website, WaterfrontNavigator.NYC, will help facilitate environmental permit applications for waterfront construction.
NYCEDC President Maria Torres-Springer says that the “one-stop” user friendly website is where regulatory agencies from the federal, state and local levels joined forces to create a resource for simplified permit planning.
Staten Island Ferry
One constant presence on the New York Harbor has been the Staten Island Ferry (or at least some incarnation of it). Formal service on the route between Manhattan and Staten Island was established in 1817 under the Richmond Turnpike Company when it began sailing the steam-powered Nautilus. Eventually, the City of New York took over the operation in 1905 when it ordered five new ferries for the route, each named after the city’s five boroughs: the Bronx, Brooklyn, Queens, Manhattan and Staten Island.
Since then, a number of new ferries have been built and retired for the now famous orange Staten Island fleet. Currently, the fleet is made up on nine ferries providing service to 22 million passengers a year. And with the population on the island growing, demand is high for a new series of ferries that provide faster, more efficient ride.
Earlier this year, New York City Mayor Bill de Blasio confirmed that the NYC Department of Transportation (NYC DOT), the agency that runs the Staten Island Ferry operation would be ordering three new ferries for the route. This would enable the operator to retire three of the older ferries in the fleet including the 51-year-old John F. Kennedy, commissioned in 1965. Additionally, the S.I. Newhouse and Andrew J. Barberi, both commissioned in 1981 will also be put out of service. The two hold the distinction of having the highest passenger capacities, with room for 6,000 passengers.
The three new 320 ft x 70 ft ferries are designed by Seattle-based Elliott Bay Design Group, and are expected to bare a striking resemblance to the beloved Kennedy, with lots of open-air space. The ferries will also be double-ended and have capacity for 4,500 passengers.
The ferries, which will be built to ABS class requirements, will be powered by Tier 4 EMD engines and Voith Schneider Propulsion drives.
Glosten Inc. will act as the Owner’s Representative [Team] providing all construction management and oversight on behalf of the NYCDOT.
Industry Day Reveals Interested Parties
At the New Staten Island 4500 Class Ferry Industry Day event held last September at the Whitehall Terminal, the NYC DOT laid out details on the Ollis class project as well as its target dates.
The city operator expects for bids to be due 90 days after it was advertised (sometime in the 3rd Quarter of 2016)—we should note that as we were going to print, the NYC DOT released the Request for Bids (RFB) for construction of the ferries; and expects to issue a Notice to Proceed (NIP) contract start by the 4th Quarter of 2016. The NYCDOT expects all three vessels to be completed within 1,460 consecutive calendar days following NIP.
Looking at the Industry Day’s attendance sheet, one could wager a guess on what yards will be bidding on the project. Conrad Shipyards, Dakota Creek Industries, Eastern Shipbuilding Group, Fincantieri Bay Shipbuilding, GD NASSCO, Leevac Shipyards, Vigor Industrial, and VT Halter Marine were all in attendance.
The first of the three new ferries, the Staff Sgt. Michael Ollis, is expected to begin operations in 2019. The ferry is named in honor of the late U.S. Army Staff Sgt. Michael Ollis, a native of the New Dorp area of Staten Island, who died while saving a Polish soldier in Afghanistan. He was only 24 years old at the time of his passing.
Vessels two and three in the Ollis Class are to be delivered later in 2019 and 2020.
FTA awards ferry grants, WETA expands
The Staten Island Ferry system will also get a boost from the U.S. Department of Transportation’s Federal Transit Administration (FTA). Under its Passenger Ferry Grant Program a total of ten projects received a combined $59 million in funding. Of that, $6 million will go to the NYC DOT, which will use part of the funds to replace the deck scows (barges) for the Staten Island Ferry Dockbuilding Unit as well as upgrade the Staten Island Ferry Maintenance Facility Ramps and Racks.
The San Francisco Bay Area Water Emergency Transportation Authority (WETA) was also a recipient of the FTA grants. Under the program, WETA will receive $4 million to expand berthing capacity at the Ferry Terminal from its current four berths to six, and the construction of three new ferry gates. According to WETA the expansion project is set to begin Summer 2017. WETA says the project will improve landside conditions at the Ferry Terminal by providing new amenities, such as weather-protected canopies, the construction of a new plaza area south of the Ferry building, the extension of pedestrian promenade areas and other public access improvements. The expansion will also enable WETA to stage emergency water transit services in the event of a regional transportation disruption or disaster.
“Improvements to the San Francisco Ferry Building ‘hub’ is a key element to expanding our services on the Bay, and validation of the important role ferry service will play in the future of the Bay Area’s transit infrastructure,” says Nina Rannells, Executive Director of WETA.
The improvements come at a time of growth for WETA. The ferry system in the Bay area has experienced a boost in ridership over the last few years and to help meet increasing passenger demands WETA has invested in both new ferries and is currently in the process of converting/refurbishing other members of the fleet.
Last April, the operator awarded Kvichak, a Vigor company, the contract to build two all-aluminum 400-passenger only ferries. The 135 ft x 38 ft catamarans, currently under construction—the hulls are being built by Kvichak and the superstructure is by Nichols Brothers Boat Builders, were designed by Australia’s Incat Crowther, and will be equipped with MTU 12V4000 M64+ EPA Tier III engines rated at 1,950 bhp at 1,830 rev/min. The engines, coupled to ZF7600 reduction gears, will enable the ferries to reach a top speed of 27 knots. Delivery of the ferries is expected to occur November 2016 and April 2017.
Beyond the newbuilds, WETA also has two of its existing ferries, the MV Intintoli and MV Gemini, undergoing upgrades at San Diego-based Marine Group Boat Works.
At press time, the MV Intintoli was nearly done undergoing a propulsion upgrade. Meanwhile, the MV Gemini is currently undergoing a minor refit to help improve vessel reliability and passenger amenities, according to WETA’s Ernest Sanchez. Among the improvement is the refurbishment of shafts, propellers and rudders, and the replacement of bearings; plus the overhaul of the Selective Catalyst Reduction System as well as the main engines, HVAC, electrical, plumbing, emission and fire and lifesaving safety systems.
The Gemini’s conversion from a Subchapter T to a Subchapter K ferry—means an increase in passenger capacity from 149 to 225 and an upgrade of the interior spaces. The MV Gemini project will be completed this summer.
WSF phases out older ferries
While New York City and San Francisco get ready to up the ferry ante, up in the Northwest, the largest ferry operator in the U.S., Washington State Ferries continues its newbuild program in the hopes of phasing out older members of its fleet and improving safety and efficiency. The ferry division of the Washington State Department of Transportation recently announced that construction has officially began on the state’s newest ferry, the Suquamish.
The keel was laid last month at Vigor’s Harbor Island Shipyard in Seattle, where Governor Jay Inslee, State Senator Christine Rolfes, and Suquamish Tribal Chairman Leonard Forsman struck ceremonial welds on to the keel—Inslee welded his granddaughter’s initials, Rolfes welded an orca whale, and Forsman welded a circle with a dot, an ancient design element found in the early Suquamish winter village.
The Suquamish is the fourth ferry in the Olympic Class, which was designed by Seattle-based Guido Perla & Associates, Inc., and is based on the Issaquah class design, WSF’s most versatile ferry. The Olympic class ferries each have capacity for 144 cars and 1,500 passengers.
While construction has officially started on the Suquamish, the third ferry in the class, the Chimacum, is about 75 percent complete. In April, Chimacum’s superstructure, built by Nichols Brothers Boat Builders, was joined to its hull at Vigor.
The Chimacum is expected to go into service on the Seattle/Bremerton route in 2017. WSF is expected to take delivery of the Suquamish in the Fall of 2018.
The total cost to build four Olympic Class ferries is $515.5 million.
The hope for WSF is to continue “investing in long-term ferry build programs” in order to keep up with increasing ridership numbers—WSF carries more than 23 million riders and 13 million cars, annually— in addition to replacing aging members of the fleet, said Matt Von Ruden, Director of vessels for WSF.
One of those aging vessels, the Hiyu was officially retired last month after nearly 50 years of service. Considered cute by many, it was even affectionately called “Baby Hiyu” by some, the ferry was tiny in size—only 162 ft long with a maximum capacity for 199 passengers and 34 vehicles—but lacked ADA accommodations and incurred high maintenance costs, rendering it obsolete.
“While the Hiyu was a good and dependable vessel, its tiny size means it is no longer the best option for moving passengers and commerce across the Puget Sound,” said Elizabeth Kosa, Washington State Ferries’ Chief of Staff. “The addition of modern, bigger and faster Olympic Class vessels to the fleet means its time to bid farewell to the Hiyu.”
Conrad christens MV Woods Hole for Steamship Authority
As we were going to press, the Woods Hole, Martha’s Vineyard and Nantucket Steamship Authority was prepping to take delivery of its newest ferry, the M/V Woods Hole.
Built by Conrad Shipyard, the ferry, was christened on May 20th at Conrad Aluminum, Amelia, LA. Called a “beauty” and a “perfect example of the ships built by Conrad…quality in every detail,” by Project Manager Thomas Rachal, the ferry features state-of-the-art technology, WiFi stations, a snack area, and oversized reclining leather seats for passenger comfort.
The M/V Woods Hole, designed by Seattle-based Elliott Bay Design Group (EBDG), is 235 ft x 64 ft with a maximum draft at 10 ft 6 inches. It has a passenger (plus crew) capacity of 384, car capacity of 55 and the freight-vehicle deck is designed to carry ten 100,000 lb tractor-trailers.
It features a highly shaped bulbous bow to help minimize wave and improve fuel efficiency. Further improving efficiency are Becker high-lift rudders, which, when working in combination with the controllable pitch propeller system and vectorable bow thruster provide the ferry with high maneuverability in a small area.
Powering the M/V Woods Hole are a pair of MTU 16V4000 EPA Tier 3 engines providing 2,680 hp connected to Hundested controllable pitch propellers, generating service speeds of 12 to 14 knots and sprint speeds of 16 knots.
The ferry is expected to go into service sometime this month providing service between Woods Hole and Martha’s Vineyard.
Alaska Class Ferries Get Named
Meanwhile, another EBDG-designed ferry series, the new Alaska Class ferries being built for the Alaska Marine Highway System have officially been named. Following a call to students from Alaska’s Governor Bill Walker to submit essays on what the ferries names should be, two students, seventh grader Malea Voran and 10th grader Taylor Thompson, won the naming rights.
The two new ferries will be named Tazlina, which Voran explained in her essay was an Ahtna Athabaskan name that means “swift river”, and the Hubbard, after the Hubbard Glacier, which Thompson says “surpasses all others (glaciers) in its beauty and magnificence. A ferry named after it would surely do the same.” The Hubbard Glacier has actually thickened over the years as opposed to melting like its other glacier counterparts, making it an anomaly to the science community.
The 280 ft ferries are being built in modules by Vigor’s Ketchikan Alaska Shipyard. Once the modules are complete—with pipes, electric cable raceways and other systems installed—they will be set in place and attached to the ships.
The two-day boat Alaska Class ferries will seat up to 300 passengers and carry 53 standard size vehicles. Delivery is expected from the yard in 2018.
Dualog names Hannemann Product Manager
JUNE 14, 2016 — Tromsø, Norway based Dualog, a maritime software solutions and ITC (Information & Communication Technology) services provider, has appointed Walter Hannemann as its new Product Manager. Hannemann, an electronics
Royal Caribbean sells Legend of the Seas
JUNE 2, 2016 —Royal Caribbean Cruises Ltd. (NYSE: RCL) announced today that it has entered into an agreement to sell its cruise ship Legend of the Seas to to U.K.-based Thomson Cruises,
Damen Shipyards delivers first Shoalbuster 3512
MAY 20, 2016 —The first of Damen’s new Shoalbuster 3512 class multipurpose workboat, the Noordstrom, was recently handed over to Dutch marine services specialist Van Wijngaarden Marine Services B.V. in the port
The Evolution of the Z-Drive Inland Towboat
Birth of the Z-drive
Z-drive propulsion is over 60 years old. The Rudder Propeller, or Z-drive as we know it today, was developed and built in 1950 by Josef Becker, founder of the present-day Schottel Group. But it wasn’t until the 1980’s that its use began in North America, when it was found predominately in ship assist tugs, not inland towboats. Since the early ‘80’s the Z-drive ship assist tug fleet in North America has grown from a handful to almost 300, tripling in the last 15 years. It continues to grow and is the dominant propulsion in newbuild ship assist tugs.
The inland towboat industry has lagged in adopting Z-drive technology, but is now on the precipice of the same exponential growth experienced in the ship assist market. In 2008, two inland companies utilized Z-drive towboats. One was Southern Towing Company out of Memphis, TN, and the other a Pacific Northwest company, Shaver Transportation. Less than a half-dozen Z-drive towboats worked the inland river system. Today, we find 10 companies and well over 50 Z-drive towboats built or under construction—and more to come. What caused the change in 8 years?
The inland towing industry is well-versed in navigating the challenging system of inland rivers and canals. It has expertise in adapting to a river’s changing depth, sand bars, currents, and back eddies, and has developed reliable routes and channels that they have followed for years. However, they also expect periodic dramatic changes—such as when a river cuts a new channel to bypass an established one that has silted in. The same is happening with propulsion technology in the industry. Z-drive technology is the cut bank that has broken through to a new and more efficient pathway towards getting the job done. Two companies were instrumental in carving this new path.
Pioneers
The growing popularity of Z-drives in the inland towing industry today is due in large part to two Z-drive pioneers of the distant and recent past—the towboat Miss Nari, and Southern Towing Company.
The Miss Nari, originally named the Delta Cities, was built as a twin-screw conventional towboat in 1951. The boat burned in 1970 and changed hands several times. Eddie Conrad renovated the newly named Miss Nari with Niigata z-drives and diesel engines, and returned it to service in 1982. It is widely accepted that the Miss Nari was the first U.S. towboat to use Z-drive propulsion on the Mississippi River system.
Bill Stegbauer of Southern Towing Company of Memphis, TN, is the more recent pioneer. In the spring of 2006, he began discussions with Ed Shearer of Shearer & Assoc., Inc., to design a new series of 3,200 hp towboats. Following research and discussion, Stegbauer decided to pursue the possibility of a towboat equipped with Z-drives. The first of eight Southern Towing Z-drive towboats went into service in August 2008.
Many factors that led Southern Towing to Z-drive towboats are the same ones driving the change today. However, Southern Towing was the first to step into the deep end of the pool while others stood on the edge, waiting to see whether the Z-drive concept would sink or swim. A key factor in getting others to follow was the empirical data generated by Southern Towing’s fleet, which had multiple opportunities to make side-by-side performance comparisons between conventional and Z-drive towboats pushing identical tows on identical routes.
Performance
Inland towboats are tasked with maneuvering large tows, running at 80% load 24/7 year round, navigating bends, currents and restricted channels, meeting other vessels in close quarters and transiting narrow bridges and locks. Key performance criteria for an inland towboat are its amount of thrust, steering power and maneuverability. Z-drive propulsion has inherent advantages over conventional propulsion in all of these categories. It has a high ratio of converting horsepower to thrust, 50% more backing (astern thrust) power, 50-70% more steering force and, of course, 360° thrust capability.
The advantageous Z-drive thrust and steering performance translate into more efficient and safer operations in most inland towing applications. A critical factor to a towboat’s maneuvering success is its ability to “hold the stern” or “not lose the stern.” That concept is extremely important to a towboat pilot. Whether he or she is going into a lock, making a bridge, or going around a bend, his or her fate rests largely on the ability to control the stern of the towboat, its location in the river, its aspect to the current, and its rate of swing and advance.
Making a bend while heading downstream is an everyday occurrence on the rivers. Flanking and driving a bend are two common techniques used to navigate a bend. Both maneuvers require the pilot to position the stern of the towboat so that the pilot can overcome the tendency of the current to sweep the tow down on the outside of the turn. In the case of driving the bend, the pilot has to have enough steering power to swing the tow and power out of the bend before the towboat ends up on the outside bank. In the case of flanking, the pilot holds the stern more or less stationary over the ground while the current pushes the head end of the tow around. Flanking requires long periods of time and large amounts of power to navigate through relatively short stretches of the river. This is less efficient and uses more fuel but is required if the towboat doesn’t have enough power and maneuverability to drive the bend. A Z-drive towboat with its superior omni-directional thrust may be able to drive the bend in cases where a conventionally propelled towboat would have to flank.
This is one example of Z-drive performance manifesting as operational efficiency in comparison to conventionally propelled towboats. A Z-drive more efficiently transfers main engine horsepower and applies that horsepower to inland towing applications. Put simply, it can do more with less. A Z-drive towboat consumes 20-30% less fuel, has shorter transit times, covers more distance per gallon and pushes a greater number of barges than a conventional towboat of similar horsepower.
Skepticism
The question remains: If Z-drives are so great what took so long? Skepticism to new technology is part of the DNA of the towing industry. And for good reason. The life cycle of a towboat can be 40 to 50 years, requires a large capital outlay and may not produce a return on investment for 5-10 years. You don’t want to make a bad bet that you must live with for 50 years. Questions of initial cost, reliability and maintenance have always been associated with the introduction of new technology, and Z-drives were no exception. What change agents overcame this skepticism? Although performance advantages of Z-drive propulsion are well documented, economic factors were the final push to get the inland towboat industry to accept Z-drive propulsion.
Economic Change Agents
There are five economic change agents:
- Empirical Performance Data
- Fleet Modernization
- Z-drive Construction Cost Parity
- Critical Mass
- Competitive Standard
Empirical Performance Data
The favorable empirical data generated by Southern Towing provided the “real” towboat data proving that the advantages of Z-drive propulsion are not just theoretical; they are a real.
Fleet Modernization
The inland fleet is in the midst of modernization. Much of the existing fleet is at or near the end of its life-cycle and needs to be replaced. Companies are faced with making large capital investments in equipment. Z-drive propulsion must be evaluated in constructing a towboat today that will remain competitive over the next 30 to 50 years.
Z-drive Construction Cost Parity
The difference in construction costs between conventional and Z-drive propelled towboats turns out to be negligible. It was once thought that Z-drives were more expensive to construct. This assumption was based on the price of Z-drive units. However, it has become apparent that the elimination of reduction gears, shafting, rudders and steering systems negate a large portion of the cost difference. There are also maintenance costs that are reduced or eliminated by removing some of the major mechanical components of a conventionally propelled towboat.
Critical Mass
The fact that there are now 50 or more Z-drive towboats in operation and under construction and more on the way has created a critical mass—whereas at one point a Z-drive towboat was a novelty, it is quickly becoming the norm.
The inland towing industry has gone through many major changes. Just two of them are the transition from steam to diesel and paddlewheel to propeller. These changes have increased efficiency, reduced fuel costs and made the industry safer. Clearly, the use of Z-drive propulsion is another such evolution. While it may not be appropriate for all inland towing applications, what was once a unique and rarely used technology is rapidly becoming an industry standard. Towboat companies positioning themselves for the future will be drawn to Z-drive propulsion. Like the rivers they transit every day, the path of the inland towing industry has cut a new channel.
The Evolution of the Z-Drive Inland Towboat
Birth of the Z-drive
Z-drive propulsion is over 60 years old. The Rudder Propeller, or Z-drive as we know it today, was developed and built in 1950 by Josef Becker, founder of the present-day Schottel Group. But it wasn’t until the 1980’s that its use began in North America, when it was found predominately in ship assist tugs, not inland towboats. Since the early ‘80’s the Z-drive ship assist tug fleet in North America has grown from a handful to almost 300, tripling in the last 15 years. It continues to grow and is the dominant propulsion in newbuild ship assist tugs.
The inland towboat industry has lagged in adopting Z-drive technology, but is now on the precipice of the same exponential growth experienced in the ship assist market. In 2008, two inland companies utilized Z-drive towboats. One was Southern Towing Company out of Memphis, TN, and the other a Pacific Northwest company, Shaver Transportation. Less than a half-dozen Z-drive towboats worked the inland river system. Today, we find 10 companies and well over 50 Z-drive towboats built or under construction—and more to come. What caused the change in 8 years?
The inland towing industry is well-versed in navigating the challenging system of inland rivers and canals. It has expertise in adapting to a river’s changing depth, sand bars, currents, and back eddies, and has developed reliable routes and channels that they have followed for years. However, they also expect periodic dramatic changes—such as when a river cuts a new channel to bypass an established one that has silted in. The same is happening with propulsion technology in the industry. Z-drive technology is the cut bank that has broken through to a new and more efficient pathway towards getting the job done. Two companies were instrumental in carving this new path.
Pioneers
The growing popularity of Z-drives in the inland towing industry today is due in large part to two Z-drive pioneers of the distant and recent past—the towboat Miss Nari, and Southern Towing Company.
The Miss Nari, originally named the Delta Cities, was built as a twin-screw conventional towboat in 1951. The boat burned in 1970 and changed hands several times. Eddie Conrad renovated the newly named Miss Nari with Niigata z-drives and diesel engines, and returned it to service in 1982. It is widely accepted that the Miss Nari was the first U.S. towboat to use Z-drive propulsion on the Mississippi River system.
Bill Stegbauer of Southern Towing Company of Memphis, TN, is the more recent pioneer. In the spring of 2006, he began discussions with Ed Shearer of Shearer & Assoc., Inc., to design a new series of 3,200 hp towboats. Following research and discussion, Stegbauer decided to pursue the possibility of a towboat equipped with Z-drives. The first of eight Southern Towing Z-drive towboats went into service in August 2008.
Many factors that led Southern Towing to Z-drive towboats are the same ones driving the change today. However, Southern Towing was the first to step into the deep end of the pool while others stood on the edge, waiting to see whether the Z-drive concept would sink or swim. A key factor in getting others to follow was the empirical data generated by Southern Towing’s fleet, which had multiple opportunities to make side-by-side performance comparisons between conventional and Z-drive towboats pushing identical tows on identical routes.
Performance
Inland towboats are tasked with maneuvering large tows, running at 80% load 24/7 year round, navigating bends, currents and restricted channels, meeting other vessels in close quarters and transiting narrow bridges and locks. Key performance criteria for an inland towboat are its amount of thrust, steering power and maneuverability. Z-drive propulsion has inherent advantages over conventional propulsion in all of these categories. It has a high ratio of converting horsepower to thrust, 50% more backing (astern thrust) power, 50-70% more steering force and, of course, 360° thrust capability.
The advantageous Z-drive thrust and steering performance translate into more efficient and safer operations in most inland towing applications. A critical factor to a towboat’s maneuvering success is its ability to “hold the stern” or “not lose the stern.” That concept is extremely important to a towboat pilot. Whether he or she is going into a lock, making a bridge, or going around a bend, his or her fate rests largely on the ability to control the stern of the towboat, its location in the river, its aspect to the current, and its rate of swing and advance.
Making a bend while heading downstream is an everyday occurrence on the rivers. Flanking and driving a bend are two common techniques used to navigate a bend. Both maneuvers require the pilot to position the stern of the towboat so that the pilot can overcome the tendency of the current to sweep the tow down on the outside of the turn. In the case of driving the bend, the pilot has to have enough steering power to swing the tow and power out of the bend before the towboat ends up on the outside bank. In the case of flanking, the pilot holds the stern more or less stationary over the ground while the current pushes the head end of the tow around. Flanking requires long periods of time and large amounts of power to navigate through relatively short stretches of the river. This is less efficient and uses more fuel but is required if the towboat doesn’t have enough power and maneuverability to drive the bend. A Z-drive towboat with its superior omni-directional thrust may be able to drive the bend in cases where a conventionally propelled towboat would have to flank.
This is one example of Z-drive performance manifesting as operational efficiency in comparison to conventionally propelled towboats. A Z-drive more efficiently transfers main engine horsepower and applies that horsepower to inland towing applications. Put simply, it can do more with less. A Z-drive towboat consumes 20-30% less fuel, has shorter transit times, covers more distance per gallon and pushes a greater number of barges than a conventional towboat of similar horsepower.
Skepticism
The question remains: If Z-drives are so great what took so long? Skepticism to new technology is part of the DNA of the towing industry. And for good reason. The life cycle of a towboat can be 40 to 50 years, requires a large capital outlay and may not produce a return on investment for 5-10 years. You don’t want to make a bad bet that you must live with for 50 years. Questions of initial cost, reliability and maintenance have always been associated with the introduction of new technology, and Z-drives were no exception. What change agents overcame this skepticism? Although performance advantages of Z-drive propulsion are well documented, economic factors were the final push to get the inland towboat industry to accept Z-drive propulsion.
Economic Change Agents
There are five economic change agents:
- Empirical Performance Data
- Fleet Modernization
- Z-drive Construction Cost Parity
- Critical Mass
- Competitive Standard
Empirical Performance Data
The favorable empirical data generated by Southern Towing provided the “real” towboat data proving that the advantages of Z-drive propulsion are not just theoretical; they are a real.
Fleet Modernization
The inland fleet is in the midst of modernization. Much of the existing fleet is at or near the end of its life-cycle and needs to be replaced. Companies are faced with making large capital investments in equipment. Z-drive propulsion must be evaluated in constructing a towboat today that will remain competitive over the next 30 to 50 years.
Z-drive Construction Cost Parity
The difference in construction costs between conventional and Z-drive propelled towboats turns out to be negligible. It was once thought that Z-drives were more expensive to construct. This assumption was based on the price of Z-drive units. However, it has become apparent that the elimination of reduction gears, shafting, rudders and steering systems negate a large portion of the cost difference. There are also maintenance costs that are reduced or eliminated by removing some of the major mechanical components of a conventionally propelled towboat.
Critical Mass
The fact that there are now 50 or more Z-drive towboats in operation and under construction and more on the way has created a critical mass—whereas at one point a Z-drive towboat was a novelty, it is quickly becoming the norm.
The inland towing industry has gone through many major changes. Just two of them are the transition from steam to diesel and paddlewheel to propeller. These changes have increased efficiency, reduced fuel costs and made the industry safer. Clearly, the use of Z-drive propulsion is another such evolution. While it may not be appropriate for all inland towing applications, what was once a unique and rarely used technology is rapidly becoming an industry standard. Towboat companies positioning themselves for the future will be drawn to Z-drive propulsion. Like the rivers they transit every day, the path of the inland towing industry has cut a new channel.