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have three V12 1350 hp (1007 kW) at 1950 rpm Cummins KTA38 M2 main engines. Auxiliary power on both ves- sels is provided by Cummins 6BT-pow- ered 68Kwe, 3 Phase, 415 volt, 50 hz generators.

Circle 79 on Reader Service Card

Rigdon Christens M/V

Esplanade

Rigdon Marine took delivery of the tenth and final contracted GPA 640 plat- form support vessel from Bender

Shipyard & Repair Co. Debbi H.

Ducote christened the M/V Esplanade before it was deployed under contract to a major oil company in the Gulf of

Mexico. Debbi is the wife of James A.

Ducote, Jr., Compliance Coordinator in the Technical Services Department of

Rigdon Marine.

The GPA 640 vessels are 210 x 54 x 19 ft. (64 x 16.4 x 5.8 m) diesel-electric

PSVs with Dynamic Positioning Class 2 (DP-2) certification and a hull designed for fuel efficiency with top speeds of 13 knots fully loaded and 15 knots in light conditions. These vessels are capable of carrying 7,135 cu. ft. of bulk material and 5,150 barrels of liquid mud in self- cleaning oval tanks. The vessels' two pumps can deliver mud to a height of 196 ft. above water. Additionally, the two 80-PSI air compressors can deliver 50 metric tons of dry cement or barite per hour to the same height.

Circle 80 on Reader Service Card

Aker To Build Subsea

Vessel

Aker Yards signed a contract worth approximately $75.4 million to build a

Subsea Inspection, Maintenance and

Repair (IMR) vessel for Østensjø Rederi

AS, scheduled for delivery in the sum- mer of 2007.

Main duties for the new vessel will be inspection, maintenance and repair, including tasks within ROV operations and light construction work. The vessel will be equipped with two hangars with a totally integrated module handling tower, skidding systems and Launch &

Recovery systems for Work ROV's. All the main operations will take place inside the closed hangars. Østensjø

Rederi AS has been assigned a five years contract with 3 x 1 years option by

DeepOcean AS and Statoil. Deep Ocean is in the process of being listed at the

Oslo Stock Exchange. The last vessel delivered to Østensjø from Aker Yards was in 1997.

Circle 81 on Reader Service Card

Main Particulars

Vessel type . . . . . . . . . .ST 255, Sub Sea IMR Vessel

Contract value . . . . . . . . . . . . . . . . . . . .$75.4 million

Yard . . . . . . . . .Aker Brattvaag: Brattvaag Skipsverft

Delivery . . . . . . . . . . . . . . . . . . . . . . . .Summer 2007

Length and width108.70 meters long, 23 meters wide

Offshore Crane AHC/CT . . . . . . .100 tons-15 meters

Dieselelectric propulsion . .6 off generator sets, each appox 2000 kW

Main propellers . . . . . . . . . . . . . . . . . . .2 x 3500 kW

Helideck . . . . . . . . . . .For Sikorsky and Super Puma

Accomodation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Deadweight . . . . . . . . . . . . . . . . . . . . . . . .6,200 tons

Design . . . . . . . . . . . . . . . .Skipsteknisk AS, Ålesund on board

As it cruises the Gulf of Alaska each summer, the Coral Princess spends only limited time in zones where bilge water can be discharged.

For complete certainty, the ship uses EcoStream from Alfa Laval.

EcoStream is a high-speed centrifugal separation system for bilge water treatment.

Without chemicals or absorp- tion fi lters, it generally reduces oil content to less than 5 ppm – even when emulsions are present. “My choice of Alfa Laval is clear,” says Paul Barrett,

Fleet Technical Superintendent for Princess Cruises. “In my opinion, EcoStream is the most effective way of reaching 15 ppm.”

With EcoStream aboard the Coral Princess, the ship’s compliance with IMO regulations is certain. And so is the protection of Alaska’s sensitive waters.

For more on EcoStream or its performance aboard the

Coral Princess, visit us at www.alfalaval.com/marine

Confidence

EcoStream

The Coral Princess uses

EcoStream, a centrifugal separation system for bilge water treatment. Designed for real-life operating con- ditions, EcoStream allows continuous operation – even on rough seas.

Circle 203 on Reader Service Card

October 2005 29

Patrol Boat Exceeds Contract Speed

Twin UltraJet 376 waterjets were chosen by the Portuguese Navy for two new aluminum 16.1 m Patrol Boats built by Arsenal do Alfeite in Portugal for the Portuguese Navy. Twin

Scania DI12M diesel engines rated at 460 kW at 2200 rpm, direct coupled to Ultrajet 376 water- jets power the vessels. During sea trials in

Sesimbra Bay the required contract speed of 23.5 knots with a displacement of 19 tons was exceeded, as the vessels reached 27.5 knots at 2000 rpm at a displacement of just under 20 tons. The vessels' deep-V hull design works well with the Scania/UltraJet propulsion system, designed to provide a comfortable ride in waves. Both boats will be in service with the

Direcção Geral de Autoridade Marítima -

Polícia Marítima, their primary mission under- taking SAR, maritime coastal and fishing sur- veillance along the Portuguese coastline. Fitted with two independent electrohydraulic control systems, a conventional steering wheel and twin lever reversing system for use in rough seas, which is backed up with an UltraJet joystick control system for ease of operation at lower boat speeds. High resistance to cavitation inherent in the

UltraJet design allows full power to be safely and efficiently applied at low boat speeds for good acceleration.

Circle 82 on Reader Service Card

Main Particulars

Boat Builder Arsenal do Alfeite

Boat Owner Portuguese Navy

Boat Designer Arsenal do Alfeite

Length 52.8 ft. (16.1 m)

Waterline length 45.2 ft. (13.8 m)

Beam 14.4 ft. (4.4 m)

Deadrise at transom 19 degrees

Deadrise at mid-waterline 19 degrees

LCG -10%

Center of Gravity 5.3 m from transom

Construction Aluminum

Speed 30 knots max

Waterjets Twin UltraJet Model UJ376

Engines Twin Scania DI12M

Crew 3 + 9

Fuel Range 200 nm

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