February 24, 2010
Washburn & Doughty delivers LNG escort tugs
Shipbuilder Washburn & Doughty Associates, Inc. of East Boothbay, Maine recently delivered the Loretta B. Moran to Moran Towing of Lake Charles, LLC. The 98 ft, 6,600 hp, Z-drive tug is the sister to the Catherine C. Moran, which was delivered in November 2009. Both tugs will provide tug services for Sempra LNG's new Cameron LNG terminal, located near Hackberry, Louisiana.
Construction on the two tugs began soon after the July 2008 fire that destroye W&D's main construction building. The vessels were built outdoors through the winter in the company's East Yard. Constructing the vessels in the East Yard necessitated launching both vessels using a crane, which had never previously been done at W&D. Donjon Marine of Hillsdale, N.J., provided the Chesapeake 1000 for both launches.
Catherine C. Moran and Loretta B. Moran each measure 98 ft x 37 ft x 16 ft They are classed ABS Maltese Cross AMS, Towing Vessel, Fire Fighting Class 1, Escort Vessel. They admeasure less than 300 gross tons and have a load line based on U.S. flag registry and USCG rules.
The tugs are powered by two EMD 12-710G7C-T2 main engines each rated at 3,300 BHP at 900 rpm. The propulsion units are Rolls Royce model US255 Z Drives. They are equipped with stainless steel propellers measuring 2.8 meters. The propeller nozzles are lined with stainless steel. Bollard pull is 83.5 metric tons ahead and 78 metric tons astern.
The vessels' FiFi 1 Fire Fighting Systems includes two skid mounted fire pump packages located in the engine room. Each consists of a Caterpillar C18, Tier 2 emissions certified, twin turbo marine engine and a FFS model SFP 250X350 HD pump. Each engine is equipped with remote start/stop and throttle control in the pilothouse and local start/stop and throttle control on the engine. Two FFS IM/FFS 1200LB electric FiFi 1 monitors are mounted on the aft upper deck. They are controlled from either the pilothouse or at the monitors. Total monitor capacity is 10,600 GPM for a distance of 400'. The Fire Fighting System also includes a deluge sprinkler system and eight fire stations located on the main deck.
Both tugs are outfitted with two John Deere model 6068TFMGK-99, Tier 2 emissions certified 1800 rpm marine engines providing 99 kW 208 V 3 phase power. Under normal conditions one generator will be on-line for ship's service and the other will be on standby. The generators will be set up for automatic paralleling. In the event that the on-line generator fails, the standby generator will automatically start and go on-line and the generator experiencing the failure will automatically shut down.
The main switchboards were provided by Industrial Power Systems (IPS) of Jacksonville, Florida and are located in the engine room. They are split bus type and provide for the automatic parallel operation of the generator sets, with shore power feeders and power distribution feeders.
The vessels are equipped with Markey DESF-48 high performance ARR electric hawser winches forward and 15 HP Markey CEWC-60 electric hawser capstans aft.
Schuyler Rubber of Woodinville, Wash., provided the fendering package. The bows are each covered with two courses of cylindrical fender up high with soft loop and wing type sub fender below. A course of D-fender, measuring 12 in x 14 in, is fitted at the main decks extending from the bow fenders at the sides and around the stern.
The electronics packages were provided by Ayer's Electronics and include two Furuno NavNet 3D integrated display systems, a Furuno FA-150 AIS transponder, a Furuno PB-150 weather station with Furuno RD-30 display, two Icom IC-M604 VHF radios, a Simrad AP50 Plus autopilot, a Furuno DFF1 black box sounder, a Furuno satellite compass, a Furuno LH 3000 loud hailer, and an Innovative Marine Systems Blue Box capable of recording video, vhf audio, and/or radar data.
Accommodations are provided for seven crew members. Joiner work was completed by Oakledge Carpentry of Harpswell, Maine.
Tank capacities are as follows:
Fuel Oil: about 40,000 gallons
Fuel Oil Overflow: about 2,600 gallons
Main Lube Oil: 1.400 gallons
Auxiliary Lube Oil: 120 gallons
Treated Sewage: 330 gallons
Gray Water: 330 gallons
Potable Water: 3,600 gallons
Ballast: about 15,700 gallons
Dirty Oil: 1.400 gallons