August 5, 2002Response joins Crowley fleetNorth Puget Sound waters are now getting increased protection with deployment of the latest tug to join Crowley's ship assist and escort services group.The newest tug, named Response in ceremonies last week, was designed by a team of Crowley engineers and architects designed the Response, with input from Crowley's ship assist and escort customer, Alaska Tanker Company. Marco Shipyard built the tug in Seattle. Tom Crowley, Jr., chairman, president and CEO of Crowley Maritime, said". "I'm proud to say that this vessel was designed in the Northwest, built in the Northwest and will operate in the Northwest." said Crowley.During tanker escorts Crowley tugs are tethered to, or shadow, tankers in the event braking or steering assistance is needed. Last year, Crowley tugs in Valdez, Alaska stopped a tanker that was in danger of colliding with a fishing boat that had its nets set across the shipping channel. Effectively slamming the brakes on a tanker requires a powerful, well designed tug like the Response, which, at 130 feet in length and 7,200-horsepower, can provide enough indirect force to get the job done quickly and safely. The Response features twin Voith Schneider 32G II/250 cycloidal propellers, powered by two Caterpillar 3608 DITA engines. It has a unique high lift and streamlined hull designed to meet the indirect forces and speed requirements of the tankers operating in Puget Sound. The hull is derived from a design for the tug Boxer and was developed by Bukser og Berging, Norway. Response is equipped with full firefighting capabilities and can carry 2,800 of foam concentrate.Response is 129.5 feet long, 45.67 feet wide and 24.75 feet deep. It is designed to generate direct bollard pull of 150,000 pounds and indirect forces in excess of 340,000 pounds at 12 knots. The Response is fitted with a Markey Model DESS-52 High Performance single-drum electric Hawser winch designed specifically for this vessel. The winch will hold 1,000 feet of 10-inch circumference AmSteel Blue high molecular weight polyethylene line with an average strength of over one million pounds. This main line will be able to be hauled in at pressures of over twice the bollard pull of the boat's engines, a condition that can occur when escorting tankers at high speed. "The winch is the only one in existence designed especially for this boat," said Todd Busch, director of sales for Crowley's ship assist and escort services. "Its ability to haul in line under load is unsurpassed." Crowley has put 13 newly built tractor type tugs into service during the past 4 years. These tugs represent the newest technology in tanker escort and ship assist. The Response incorporates some of the best design features of the Boxer, along with the proven capabilities of the recently built Crowley tugs. "Our customers are anxious to see the Response operating in Puget Sound," Busch said. "Its features will add a measure of safety while escorting tankers on the open water and when assisting them in and out of berths."
June 10, 2002Bollinger completes repower conversionBollinger Shipyards, Inc., has completed the conversion of the single engine Crescent Towing tug Florida to a 4,000 hp twin-engine boat. It is the first of eight Crescent Towing 105-foot sister ships to undergo the same major conversion at Bollinger's Algiers (New Orleans) repair and conversion shipyard. The Florida's old engine was replaced with two Caterpillar 3512B engines coupled to Reintjes WAF 673 reduction gears driving 83-inch Bollinger stainless steel propellers. The propellers were installed in 84-inch type 37 kort nozzles with stainless steel inner rings and leading and trailing edges. The boat has a 45° rudder angle for better maneuverability and its new power package is designed to generate 100,000 pounds or 50 tons of bollard pull. The boat's stern was modified to accommodate the new propulsion system. Bollinger also reconstructed the wheelhouse with low profile stacks for maximum visibility and installed new radars, GPS, depth sounders, hailers, VHF radios, fax machines, sound powered telephones, fuel emergency shut off systems, and remote control start and stops for the main engines. New Coast Guard approved oil and water separators and sanitary systems were installed and channel coolers were replaced with keel coolers. Living spaces and the galley were refurbished and new air conditioning and heating was installed. Larry Ohler, Crescent vice-president and port engineer said, "FLORIDA is running great and is everything we thought it would be. She went up the Mississippi River at over 10 knots at a river stage of 13.5 feet and downstream at over 16 knots. Power, maneuverability and visibility are all excellent. She pulled out a sea-going barge that was aground without the need for full throttle and normal docking and undocking has been improved all around, along with crew comfort." The Crescent tug Louisiana is now at Bollinger Algiers for an identical conversion It will be followed by the Ned Ferry, G. Shelby Freidrichs, Mississippi, Margaret F. Cooper, Texas, and Glenn Smith. All the boats are105-feet in length with a 26-foot beam and 13.5 foot depth. They were built in the late 1950s and early 1960s. Ohler said testing on the FLORIDA's hull revealed that it is still 1 1/16th inch thick. "That reflects excellent maintenance," he said, "and with these improvements, our tugs will be useful for another 30 to 35 years." New Orleans-based Crescent Towing is part of the Cooper Group of companies (www.coopertsmith.com). Its 23 tugs provide harbor towage for vessels on the Mississippi, Mobile and Savannah rivers.