First DP1 tug for Crowley launched at Bollinger

Thanksgiving weekend festivities at Bollinger Marine Fabricators, LLC, Amelia, LA, included the launch of the Ocean Wave, the first of four Ocean Class Tugs for Crowley Maritime Corporation, Jacksonville, FL.

The photo below shows the Ocean Wave and sister tug Ocean Wind moving down the erection lane onto the the dry-dock at Bollinger’s Marine Fabricators LLC facility. What’s notable about the tugs is that the Ocean Wave and sister tug Ocean Wind are classed DP1, with boats 3 and 4, Ocean Sky and Ocean Sun classed DP2.

The Ocean Wave and Ocean Wind are built to ABS Class, A1, Towing Service, +AMS, +ABS +ABS Fire Fighting Vessel Class 1 +ABS DP-1, with U.S. Coast Guard Certificate of Inspection, Green Passport, SOLAS and
International Load Line Certificate.

The twin-screw, steel-hulled tugs will have an overall length of 146 ft, beam of 46 ft, hull depth of 25 ft and design draft of 21 ft.

Propulsion will be supplied by two Caterpillar C-280-12 Tier II-compliant diesel engines, designed to operate on Ultra Low Sulfur Diesel fuel and each is rated at 5,440 bhp at 1,000 rev/min driving the controllable pitch propellers through Reintjes LAF 5666 reduction gears. Added maneuverability will be supplied by a Berg VFD 850-hp bow thruster. The tugs will have an impressive minimum rated bollard pull of 165 tonnes.

Electric power is provided by one 340 kW Caterpillar C-18 Tier II auxiliary generator, two 1,475 KVA shaft generators and one 125 kW Caterpillar C-6.6 Tier II emergency generator system.

With the environment in mind, all of the tug’s tanks containing oil or traces of oil are inboard of the side shell, creating a double hull designed to limit any overboard discharges.

As for the DP2 classed Ocean Sky and Ocean Sun, each tug will be 10 feet longer than their DP1 sisters at 156 ft. Additionally, the Ocean Sky and Ocean Sun will have two Berg VFD 500-hp bow thrusters and a Berg 500-hp stern thruster in keeping with their DP2 Class.

November 25, 2011