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Marine Log

February 9, 2007

Baydelta exercises tug option

Baydelta Maritime of San Francisco has exercised an option for a second 100-foot, 6,800-hp harbor tug from Nichols Brothers Boat Builders, Inc., Freeland, Wash. The yard has also received an order for a similar tug from Minette Bay Shipdocking, Ltd., of Prince Rupert, British Columbia.

Nichols expects to deliver its first Baydelta tug in June, with the optioned tug due in October. Delivery date for the Minette Bay tug is set for December.

The tugs have been designed by Jensen Marine Consultants, Inc., of Seattle with ship handling as their primary purpose, although they will also be fitted for long-haul towing. The vessels will mount Markey Machinery hawser winches forward for ship assist and escort and JonRie stern-mounted towing winches for high seas towing service.

The tugs will each be powered by a pair of Tier I compliant 3400-hp Caterpillar 3516C diesel engines.

In the Baydelta tugs, the engines will power two Rolls-Royce 255 Z Ğdrive units. The Minette boat will use Nigata ZP41 drives.

Nichols says that the horsepower ratings will be among the highest posted for z-drive tugs.

Increased horsepower is complimented by a heavy skeg to foster ship handling and escorting.

Potential Bollard pull has been estimated at 85-90 metric tons ahead and 78-82 astern.

Both the Baydelta and Minette tugs are arranged with space for ABS Fi-Fi 1 fire fighting systems and the Minette tug will be fitted with the full ABS system with two monitors, a deluge system, and foam tanks. This involves two 6,000 gpm pumps running off the main engines. The Baydelta tugs will be fitted with 900-gpm fire pumps and monitors.

Additional machinery aboard each tug will include two 215 kW Cat C-9 generators and a 27 kW standby harbor generator.

The tugs will have unusually commodious and comfortable berthing; while a normal harbor crew will include four people, the Baydelta tugs will accommodate up to 10 crew for longer hauls. Facilities also include a laundry, galley, and a crew lounge.

Tanks will hold 71,000 gallons of fuel oil, 1,500 gallons of lube oil, and 8,000 gallons of fresh water. Tanks will also be provided for 1,800 gallons of waste oil and 1,400 gallons of sewage.

The Minette Bay tug will have accommodations for six persons and fuel capacity will be 69,400 gallons.

Nichols Brothers also recently signed a contract to participate in building two 108 x 28-foot, 149-passenger catamarans for the Water Transit Authority in San Francisco Bay for delivery this year. Nichols Brothers will participate with Kvichak Marine of Seattle in building these vessels.