Page 21: of Maritime Reporter Magazine (July 1995)

EUROPEAN UPDATE "Ulstein" continued from page 22) >ption — to provide support duties "or Statoil. Extra cargo space on the

JT746 has been made possible by ncreasing overall length from 270- 't. (82.5-m) to 287-ft. (87.7-m) and ncreasing the molded depth. Other mprovements — provided by the leeper hull form and addition of a ully plated cargo rail — include a •evised cargo deck, increased tank lapacity and a better working deck mvironment. New larger, circular nud tanks have been added with- >ut internal stiffening, making the leaning process much easier. Both nethanol and fuel capacities have ilso risen significantly.

Particular attention has been jiven to the accommodation and vheelhouse areas. The twin funnel irrangement on the earlier design las been dropped in favor of a single :asing, offset to port. This modifi- :ation has improved wheelhouse vis- bility as well as reduced the effect )f casing penetrations through the iccommodation structure. The air- londitioning plant is relocated be- ow wheelhouse level, and to im- prove the crew's comfort and recre- ition, the mess deck has been raised rom the main deck to A-deck level.

Revisions have been made to the propulsion and thruster arrange- nent, but follow Ulstein's proven win-shaft practice of locating the wo main engines well forward, just ift of the accommodation block, driv- ng aft-mounted gearboxes via long ntermediate shafts. The system is lesigned to minimize the problems >f trunking exhaust gases away from he working deck area, and releases ;he high volume parallel mid-body or cargo tank capacity and an un- buffered working deck.

Installed power will be raised from 2,650 kW to 3,245 kW by the fitting >f eight-cylinder Ulstein Bergen 3RM engines in place of the previ- >us six-cylinder units. To accommo- late the extra power and provide mproved fuel efficiency, larger 11.5- 't. (3.5-m) diameter propeller units ire specified. As with the UT745, ;he controllable pitch propellers are

Iriven via two-speed gearboxes. To :ompensate for the larger vessel size, ;he aft side thruster has been in- ireased in size to 1,000 hp. The hull ines, particularly aft, have been >ptimized for higher speeds and ower resistance than traditional 3

SVs. Consequently, the fuel sconomy of the UT746 and the over- ill propulsive efficiency are greatly mproved.

By contrast, the four UT755 ships o be built are a new design devel- >ped as a cost-effective solution to current routine and projected off- shore requirements. Although smaller than the other vessels [220- "t. (67-m)], they will still have im- pressive tank capacities - 800-cu.- n. of mud and 400-cu.-m. of brine.

Brattvaag will build a pair of ves- sels for Gulf Oil U.K., while the

Boviknes contract is with a division )f Britannia Marine, which holds luly, 1995 options for an additional two identi- cal vessels. The UT755 is designed to satisfy industry requirements at the lower end of the market, with interest coming from the Far East,

Gulf of Mexico and those operating in the marginal fields of the U.K.

North Sea sector. According toKarl

Johan Bakken, vice president of

Ulstein International, this new de- sign offers the market a competi- tively priced vessel with compact dimensions but with an excellent cargo balance and capacity. The cargo deck area measures 620-sq.- m. and the ship's total deadweight capacity is 2,150 tons. Completing the current order intake is the UT750 — another refinement of the UT745 — ordered by Farstad Shipping. The contract, with an option for another vessel, brings the number of vessels built for Farstad by Ulstein, or to

Ulstein designs, to 17.

New "deep crater" piston design maximizes . combustion efficiency.

The new Electronic Unit Injector System precisely meters fuel, providing excellent efficiency and performance with very low emissions.

Introducing a new generation of Cat* 3500

Engines that run leaner than ever.

Today's Caterpillar® 3500 Family of Engines from 600-3000 hp are more powerful, convenient and fuel efficient than ever. And you have more choices than ever, too.

Now available with electronics.

Now you can choose from our mechanical Cat 3500s, or our new

Cat 3500 Series B Electronic Engines which offer high-tech performance and proven reliability.

We started with our industry- leading Cat 3500s. Redesigned the pistons and camshaft to improve combustion. Then added a new elec- tronic unit injector system that reduces emissions and smoke, and increases fuel economy.

Add self-diagnosing electronics and the engine's ability to electronically communicate with other components, and suddenly today's Cat 3500Bs are

Circle 271 on Reader Service Card among the most advanced engines afloat. Backed by over 1,200 factory authorized dealers worldwide.

You simply won't find leaner or meaner engines than the new

Cat 3500 Series B Engines. Call 1-800-321-7332 or fax 1-309-578-2559 today for a free catalog.

CATERPILLAR © 1995 Caterpillar Inc.

The new Electronic

Control Module constantly monitors engine condition and automatically makes adjustments to optimize performance.

Larger camshaft drives unit injectors at higher pressures for better air-fuel mix and cleaner combustion.