On Thursday on the New Orleans riverfront, Crowley Maritime Corp. christened the first two tugs in its Ocean-class series — the Ocean Wave and Ocean Wind.
The 146’x46′ DP-1 tugs were built at Bollinger Marine Fabricators in Amelia, La., the same yard where McDermott built 25 Invader-class tugs for Crowley. The second pair of tugs, the Ocean Sun and Ocean Sky, will be DP-2, which involves lengthening the hull 10’ to accommodate the extra equipment. The Sun and the Sky are underway at Bollinger and will be delivered next year.
The Ocean-class is ideally suited to work with Crowley’s new 455 series high-deck strength 400’x105′ barges. The new tugs will be outfitted for long-range, high-capacity ocean towing, rig moves, platform and floating production, storage and offloading (FPSO) unit tows, emergency response and firefighting.
“We are raising the bar in terms of reliability, power and environmental friendliness with the addition of these tugboats,” said Tom Crowley, chairman, president and CEO, of Crowley. “These new boats will be workhorses for our valued upstream energy customers and for companies and government entities needing long-range, high-capacity, ocean towing along with salvage and emergency response support.”
The tugs’ Caterpillar C-280 5,440-hp main engines and Cat generators are all EPA Tier II compliant, and can be upgraded to meet future environmental standards. Additional environmental protection is provided by the Ocean-class tugs’ double-hulls, which are designed to prevent any overboard discharges of fuel or fluids. All tanks containing liquids are inboard of the side shell.
For safety, the new tugs will all feature waterfall-style winches, shark jaws and retractable pins that can all be controlled from the pilothouse. This will keep the deck clear of personnel and reduce the risk of accidents.
The tugs are designed to have a minimum bollard pull of 150 metric tons with a range of approximately 12,600 nautical miles at 15 knots free running. The tugs are outfitted with twin-screw, controllable-pitch Berg 4-bladed propellers in nozzles and high-lift rudders. The Cat C-280s turn the Berg 153.5″-dia. props through Reintjes LAP 5666 marine gear. The Wave and Wind also have a Berg VFD, 850-hp electric bowthruster, while the DP-2 Sun and Sky will have two Berg VFD 500-hp electric bowthrusters and a Berg 500-hp stern thruster. The Berg props and thrusters and Reintjes gears are all from Karl Senner Inc. in New Orleans.
The Ocean-class boats are designed and built to Green Passport class notation standards, which inventory materials in a vessel’s structure, systems and equipment that may be hazardous to health or the environment.
Jacksonville, Fla.-based Crowley Holdings Inc., is the holding company of the 120-year-old Crowley Maritime, a privately held family and employee-owned company.