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Wednesday, April 1, 2020 

Rudderpropeller units from Schottel of Germany will be used for four new ship handling tugs being built for the Royal Canadian Navy by Ocean Industries of Quebec.

Two of the tugs are to be delivered to the major Canadian naval base in Esquimalt, British Columbia, and two to the base in Halifax, Nova Scotia. Each Robert Allan Ltd (RAL)-designed ASD tug will feature two Schottel Rudderpropellers type SRP 430 FP (1,860kW each) with fixed pitch propellers measuring 2.40m in diameter. The azimuth thrusters will be driven by diesel engines. This configuration will achieve an expected bollard pull of 60t and a free running speed of about 12 knots. Known as the Naval Large Tug (NLT) project, the new IMO Tier III vessels are based on the RAL RAmparts 2400 design.

The principal characteristics of the SRP derive from the combination of propulsion and azimuth steering. There is consequently no need for a rudder, and the engine power is optimally converted into thrust. The 360° rotation of the rudderpropeller means that the full input power is available for manoeuvring.

These new tugs will provide towing, firefighting and other critical support services to both the Atlantic and Pacific Maritime Forces. Each tug will have an LOA of 24.4m, moulded beam of 11.25m and draught of 5.40m The vessels will accommodate a crew of six and have a secondary firefighting capability.

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