Kockums Delivers Big Vehicle Carrier To Wallenius Lines

The first of four huge car and truck carriers ordered by Wallenius Lines for 1985 delivery from Swedish and Japanese shipyards was delivered recently by Kockums of Malmo. Named Tristan, following the owner's tradition of naming vessels after famous operas, the new carrier is almost identical to the last ship of the Madame Butterfly Class, which was delivered to Wallenius by Kockums in 1981-82.

Tristan has a capacity of 6,230 passenger cars or a combination of 2,930 cars and 540 heavy vehicles.

She has an overall length of 649.6 feet, beam of 105.9 feet, depth to weather deck of 103.35 feet, and scantling draft of 37.7 feet. Deadweight on maximum draft is 28,070 metric tons. There are 13 decks, four of which are hoistable, providing a total parking area of 53,140 square meters.

The vessel is built to the highest class of Lloyd's Register of Shipping, + 100 Al, +LMC, UMS, Ice Class 3, Vehicle Carrier.

The main engine is the latest model Sulzer type 7 RTA 68 with an output of 18,400 bhp, with constantpressure supercharging and the power output optimized for minimum fuel consumption. The propulsion machinery is direct-reversible and connected to a fixed propeller, and is remote-operated from the bridge or the engine control room.

Service speed is 20 knots.

Electrical power is supplied by three Wartsila-Vasa diesel engines, each driving a 2,000-kva alternator, all installed in a separate generator room. Tristan is a unifuel ship, with main and auxiliary engines all burn- ing the same type of heavy fuel oil, up to 600 cSt.

Heavy vehicles are loaded on the 4th, 6th, and 9th decks, which are reinforced to carry heavy loads. The 5th, 7th, 10th, and part of the 8th decks are divided into hoistable sections, which allow vehicle heights of up to 20 feet 4 inches.

The 6th deck is normally the car entrance deck, but at higher berths the middle outside ramp may also be attached to deck No. 7. The two outside loading ramps are positioned at the starboard side; the aft one will be rigged with 25-degree aft angle to provide loading of long vehicles. Internal ramp systems between decks to doors and to openings in transverse bulkheads make it possible to load/discharge the entire ship via one of the outside ramps.

Distributed along the entire length of the ship are 53 fans that have the capacity to change the hold air volume 25/50 times per hour.

They are operated in sections or individualy from a separate control room on the upper deck, from which ballast pumps and valves are also manipulated.

All navigational equipment is of the latest design. The radar unit has anti-collision computer, with free choice of picture presentation and other possibilities. The autopilot is a totally self-adaptive, fuel-saving type with set radius steering for turns. Ship's position is indicated by a Navstar unit (Decca Navigator) as well as a Magnavox satellite receiver.

Speed log equipment is duplicated, with a pressure log for deep waters and a doppler unit for restricted waters. The radio station is equipped with a Maritex unit.

Other stories from April 1985 issue

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