Page 6: of Maritime Reporter Magazine (January 1981)

Combination Gas Tanker 'Hektor'

Delivered By Moss Verft

The Moss, Norway, yard of

Moss Rosenberg Verft A/S, a member of the Kvaerner Group, recently delivered the liquefied petroleum gas/chemical tanker

Hektor to A/S Nordsjogas of

Stavanger, Norway. The ship has a total cargo capacity of 24,000 cubic meters divided in three tanks. These are designed for carrying propane, butane, ammo- nia, vinyl chloride (VCM) as well as mixtures of propane and bu- tane. Two types of cargo can be carried simultaneously.

Hektor is built according to Det norske Veritas class + 1A1, Ice C,

EO, Tanker for Liquefied Gas.

She is constructed in accordance with U.S. Coast Guard Rules and

Regulations for Foreign-Flag Ves- sels, and also complies with IMCO

Gas Code Regulation A 328 IX.

The ship has an overall length of 157.80 meters, beam of 24.40 me- ters, and depth of 16.00 meters (517.7 by 80 by 52.5 feet). At maximum draft of 10.70 meters (35.1 feet), she has a deadweight of 20,000 tons; gross tonnage is 15,819.

The ship is built with a single deck and without forecastle and poop. All accommodations and the engine room are arranged aft.

Seven watertight bulkheads sub- divide the ship, which is built with double bottom and single shell.

The shell, main deck, and inner bottom in the cargo area are fabricated of steel meeting the re- quirements of a secondary barrier for cargo containment.

Hektor has three independent, self-supporting cargo tanks of prismatic shape. They are de- signed for carrying fully cooled

LPG, NHs, and VCM operating with a slight overpressure; low- est permissible temperature is minus 48 C. The tanks are built as a welded structure of plates of low-temperature steel, and in- sulated on the outside with poly- urethane.

All pipe connections to the car- fanaHiT

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Since 1878

Versatile LPG/NH3/VCM tanker Hektor, completed recently by Moss Verft for A/S

Nordsjogas, Stavanger, Norway, is powered by 14,400-bhp Horton/Sulzer diesel. go tanks are connected to the tank dome. Discharging is car- ried out in about 10 hours by six deepwell pumps, two in each tank.

Crossovers connect the ship's loading /discharge lines with load- ing arm on shore. Boil-off from the cargo is fed to the onboard reliquefaction plant, which con- sists of three two-stage units that reliquefy the gas and return it to the cargo tanks.

Main propulsion is by a Horton/

Sulzer 6RND76M diesel with max- imum continuous rating of 14,400 bhp at 122 rpm. Trial speed was 17.5 knots at a draft of 9.2 me- ters (about 30.2 feet). Two side thrusters are installed, one for- ward and one aft.

The ship is equipped with a gas detector and an inert gas plant; both are of Moss design and were fabricated by Moss Verft. Navi- gation equipment includes two radars, Decca Navigator, radio direction finder, gyrocompass sys- tem, autopilot, echosounder, and magnetic compasses.

Diesel Shipbuilding Delivers

Steel Harbor Tug To Ecuador

Diesel Shipbuilding Company of

Jacksonville, Fla., recently deliv- ered a 46-foot tugboat to the Port

Authority of La Libertad, Ecu- ador. The main engines for the twin-screw La Libertad were sup- plied by Coastal Power Products of Jacksonville. They are a pair of General Motors Detroit Diesel engines, each with a continuous rating of 230 bhp at 1,800 rpm, with 32-volt starting and 60-amp, 32-volt alternators on each en- gine. Reduction gear ratio is 4.5:1. The propellers are Ellis 4-blade bronze, 48 by 36 inches, and the propeller shafts are 4y2- inch PH stainless steel furnished by Western Branch Metals. Fuel capacity is 1,750 gallons.

The new tug is of steel con- struction with a 15-foot beam and draft of 6 feet. Hull construction is 5/16-inch plate and the deck is ^-inch. There are five trans- verse bulkheads of ^-inch plate, and one longitudinal of ^-inch.

James W. Coppedge, president of Diesel Shipbuilding, said, "We have specialized in the construc- tion of steel vessels, building a variety of shrimp boats and other workboats to meet the need for rugged, seaworthy boats. Our steel vessels have met that need for three generations."

The pilothouse has a Wagner model N400-1500, hydraulically operated steering system with a 42-inch mahogany wheel, Perko navigation lights with screens, and One Mile Ray searchlight.

Quarters in La Libertad are of the day type, with settee cush- ions in the aft end of the wheel- house, and two pipe berths.

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Diesel Shipbuilding of Jacksonville has delivered the tugboat La Libertad to the

Port Authority of La Libertad, Ecuador. Boat is powered by two Detroit diesels. 8 Maritime Reporter/Engineering News