German manufacturer of ship propulsion and steering systems, SCHOTTEL will supply its rudderpropellers for the Royal Canadian Navy’s new ship handling tugs.
The tugs are being built at the Ocean Industries Inc. shipyard in Quebec under a $102 million Naval Large Tug (NLT) contract awarded last year.
These new tugs will provide towing, firefighting and other critical support services to both the Atlantic and Pacific Maritime Forces. They will replace the Royal Canadian Navy’s five civilian-crewed Glen-class large tugs and two Fire-class rescue boats.
Each tug will have an overall length of 24.4 metres, a moulded beam of 11.25 metres and a draught of 5.40 metres along with space for a crew of six.
Two of these tugs will go to Canadian Forces Base (CFB) Esquimalt in British Columbia and the other two will be delivered to CFB Halifax in Nova Scotia. The first two tugs are scheduled to be delivered in 2021 with the last two tugs delivered in 2023.
Each of the four ASD tugs will feature two SCHOTTEL Rudderpropellers type SRP 430 FP (1,860 kW each) with fixed pitch propellers measuring 2.40 m in diameter. The azimuth thrusters will be driven by diesel engines. This configuration will achieve an expected bollard pull of 60 tonnes and a free running speed of approximately 12 knots. Known as the Naval Large Tug (NLT) project, the new IMO Tier III vessels are based on the Robert Allan Ltd. RAmparts 2400 design.
The principal characteristics of the SCHOTTEL Rudderpropeller (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.