Robert Allan Completes Design for Escort Tug

Robert Allan Ltd. has completed the design for a major new escort tug for Norwegian tug owners Johannes Østensjø dy AS of Haugesund. The tug will be dedicated to tanker escort operations on the west coast or Norway. The construction contract has been awarded to Astilleros Zamakona A/S of Vizcaya-Bilbao, Spain, with an expected delivery in early 2000. The tug will be built in accordance with DNV regulations as an escort tug, with fire-fighter I and oil recovery certification. It is equipped with the highest standard of oil spill containment and recovery equipment, all of which is stowed in a large "garage" adjacent to the enclosed winch room. A large knuckle-boom crane will serve to launch and recover the equipment, as well as handle deck equipment and stores. Predicted performance is for a bollard pull of 90 tons, a free-running speed of 15 knots and an escort steering force of 150 tons. The tug is configured to operate in the "skeg first" direction for all escort operations, but the hull form has been refined for best possible seakeeping capabilities in both directions. The "aft" end includes a raised fore-castle and would be the direction used for running free at sea in more severe sea states, and for any rescue or long-distance towing. However, model tests indicate the lines at both ends offer a dry working deck environment in up to 19.7 ft. significant seas. Robert Allan Completes Design for Escort Tug Robert Allan Ltd. has completed the design for a major new escort tug for Norwegian tug owners Johannes Østensjø dy AS of Haugesund. The tug will be dedicated to tanker escort operations on the west coast or Norway. The construction contract has been awarded to Astilleros Zamakona A/S of Vizcaya-Bilbao, Spain, with an expected delivery in early 2000. The tug will be built in accordance with DNV regulations as an escort tug, with fire-fighter I and oil recovery certification. It is equipped with the highest standard of oil spill containment and recovery equipment, all of which is stowed in a large "garage" adjacent to the enclosed winch room. A large knuckle-boom crane will serve to launch and recover the equipment, as well as handle deck equipment and stores. Predicted performance is for a bollard pull of 90 tons, a free-running speed of 15 knots and an escort steering force of 150 tons. The tug is configured to operate in the "skeg first" direction for all escort operations, but the hull form has been refined for best possible seakeeping capabilities in both directions. The "aft" end includes a raised fore-castle and would be the direction used for running free at sea in more severe sea states, and for any rescue or long-distance towing. However, model tests indicate the lines at both ends offer a dry working deck environment in up to 19.7 ft. significant seas.