Search Results for: "Diversified Marine Inc."

compact red tugboat

Compact new Crowley tug is clean and powerful

Crowley Maritime Corporation’s ship assist and harbor escort services group has taken delivery of Apollo, a powerful and maneuverable 78-foot long tugboat that delivers an estimated 94 tons of bollard pull and

Harley Marine opts for tug-specific Cat package

They will power two new harbor tugs currently under construction at Diversified Marine Inc.’s Portland, OR, shipyard.

“Much of Harley Marine’s fleet is powered by Cat engines, and with the construction of these two new vessels, they’re adding our tug-specific propulsion solution as well,” said Emil Cerdier, sales manager for Cat Propulsion. “Getting a complete package from one supplier simplifies the design,installation, and service support, allowing Harley to rely on the Cat dealer network as a single point of contact for the entire powertrain system.”

Each Harley Marine harbor tug will feature a pair of 3516 engines, each delivering 2575 hp(1920 kW) @ 1600 rpm and two MTA 524-T thrusters with a 95.5″ inch (2,400mm) propeller diameter.

The MTA 524-T is a new version of a proven design, specifically optimized for the operation profile of a tug. Based on the standard MTA design, the “Tug” rated drives include features to maximize bollard pull, simplify installation and maintenance, and increase maneuverability.

The Harley Marine units will be delivered with custom-made fixed-pitch propellers and a PTO-powered steering and lubrication system.
Cat Propulsion’s complete package for tugs includes engines, high-speed shafting, clutches, and controls. The display consoles for the control system willalso control engine and thruster functionality.

“Our MTA-T units bring the twin advantages of performance excellence and economy to the tug market,” Mr. Cerdier said. “Customers like Harley Marine will benefit both in terms of bollard pull and from the reliability of a consolidated control-engine-thruster package with component parts optimized to work together.”

Cat dealer Peterson Power led the efforts on the project, helping refine the spec and eventually supporting the installation and service of the systems.

As part of the total Cat Solution, Cat Financial is providing complete vessel financing throughout the construction and term of both tugs.

The Cat engines and thrusters are expected to deliver in mid-2016, with vessel deliveries in early 2017.

Second “enhanced” RAmparts tug joins Harley Marine

The Lela Franco, named in honor of the  wife of HMS founder Harley Franco, is a sister ship to the Michelle Sloan delivered earlier this year. Designed by Robert Allan Ltd., both tugs were built at shipbuilder Diversified Marine Inc.’s Portland, OR, shipyard.

The Lela Franco is the sixth tractor tug HMS has added to its fleet in under two years, improving its ship assist and tanker escort capability and bringing more horsepower to the U.S. West Coast. Like its twin sister the Michelle Sloan, it is an enhancement of HMS tugs the Tim Quigg and John Quigg, built in 2004 also by DMI. These enhanced designs developed by Robert Allan Ltd. feature a wider hull, increased bollard pull performance, improved crew accommodations, and a modified skeg.

Particulars of the Lela Franco are as follows:

  • Length overall: 80′-0″
  • Beam, molded, extreme:36′-0″
  • Depth, molded (hull):16′-8″
  • Maximum draft:17′-5″
  • Gross Tonnage: <200 GRT (US Tonnage)

The tug was designed and constructed to satisfy all applicable USCG rules and regulations and meets or exceed classification society minimum scantling requirements. Tank capacities are as follows:Fuel Oil:          32,800

On trials, the vessel achieved an average bollard pull, ahead, of 69.0 short tons and a maximum of 71.3 short tons, Astern, average bollard pull was 65.4 short tons and maxium was 67.4 short tons.  Free running speed, ahead, was 12.5 knots   

The vessel has been outfitted to the highest standards for a normal operating crew of two, with accommodations for up to six persons. The Master’s cabin is located on the main deck, with two additional double crew cabins located on the lower accommodation deck. There is also a galley and mess room located on the main deck.

The deck machinery comprises a Markey DEPC-48 render-recover type ship assist hawser winch on the bow, spooled with 500′ of 9″ line, and a Markey DEPC-32 towing winch aft with a capacity of 250′ of 6-1/2″ line. In addition, a capstan is installed on the fore deck to facilitate line handling operations.

The raised forecastle and elevated wheelhouse ensure good all-round visibility of the working decks and when handling large barges with high freeboard. The higher freeboard feature also provides a high standard of seakeeping when working in exposed waters, but is configured so as not to impede the ability of the tug to work closely under the flare of the newer generation of large ships.

Main propulsion power for each tug is provided by a pair of CAT 3516C diesel engines, each rated 2,575 bhp at 1,600 rpm, and each driving a Rolls-Royce US 205 Z-drive unit, with a 94.5″ diameter fixed pitch propeller.

The electrical plant consists of two (2) identical CAT C6.6 diesel gen-sets, each with a power output of 125 ekW, 60 Hz.

Ship-handling fenders at the bow consist of one tier of 36″ OD x 18″ ID cylindrical fender at the main deck level, with 12″ loop type Schuyler fenders between the main deck and the knuckle, 11″ laminated bow fenders below, and 12″ hollow D style fenders along the stem and skeg. Tires and 8″ hollow “D” fender provide protection at the main and forecastle sides and sheer lines, and 12″ loop type fendering is used at the stern.

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