CCGS Henry Larsen
Henry Larsen in St. John's Harbour, 2010
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| History | |
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 Canada
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| Name: | Henry Larsen |
| Namesake: | Henry Larsen RCMP ship captain and arctic explorer |
| Operator: | Canadian Coast Guard |
| Port of registry: | Ottawa, Ontario |
| Ordered: | 25 May 1984 |
| Builder: | Versatile Pacific Shipyards Limited, Vancouver, British Columbia |
| Yard number: | 110 |
| Laid down: | 23 August 1985 |
| Launched: | 3 January 1987 |
| Commissioned: | 29 June 19888 |
| In service: | 1988–present |
| Refit: | 2000 |
| Homeport: | CCG Base St. John's (Newfoundland and Labrador Region) |
| Identification: |
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| Status: | in active service |
| General characteristics | |
| Class and type: | Pierre Radisson-class icebreaker |
| Tonnage: | |
| Displacement: | 8,290 long tons (8,420 t) full load |
| Length: | 99.8 m (327 ft 5 in) |
| Beam: | 19.6 m (64 ft 4 in) |
| Draught: | 7.3 m (23 ft 11 in) |
| Ice class: | Arctic Class 4 |
| Propulsion: |
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| Speed: | 16 knots (30 km/h; 18 mph) |
| Range: | 20,000 nautical miles (37,000 km; 23,000 mi) at 13.5 knots (25.0 km/h; 15.5 mph) |
| Endurance: | 90 days |
| Capacity: | 40 |
| Complement: | 31 |
| Sensors and processing systems: |
1 × Sperry Marine Bridgemaster navigational radar |
| Aircraft carried: | 1 × light helicopter |
| Aviation facilities: | Hangar and flight deck |
CCGS Henry Larsen is a Canadian Coast Guard Improved Pierre Radisson-class icebreaker serving in the Newfoundland and Labrador region and based in St John's, Newfoundland and Labrador. Entering service in 1988, Henry Larsen is the fourth ship and of an improved design over the rest of the ships in her class. The ship operates in the Arctic Ocean during summer months.
Classified as a Medium Gulf/River Icebreaker by the Canadian Coast Guard, Henry Larsen was ordered to a modified design from the rest of the Pierre Radisson-class icebreakers. The vessel's hull form differs from her classmates, with a differently-shaped bow with a raised forecastle and underwater "ice knife". The vessel also has a different propulsion system. Furthermore, the ship has a Wärtsilä air-bubbling system installed to allow the vessel to reduce hull friction and more easily break ice.Henry Larsen displaces 8,290 long tons (8,420 t) at full load. The vessel has a gross tonnage (GT) of 6,166 and a net tonnage (NT) of 1,756 making her the largest vessel in the class. The icebreaker is 99.8 metres (327 ft 5 in) long overall with a beam of 19.6 metres (64 ft 4 in) and a draught of 7.3 metres (23 ft 11 in).
The ship is propelled by two fixed-pitch propellers driven by a diesel-electric system comprising two GE AC generators and three Wärtsilä Vasa 16V32 diesel engines. Combined, the system creates 12,174 kilowatts (16,326 hp), giving the ship a maximum speed of 16 knots (30 km/h; 18 mph). The ship carries 1,650 m3 (58,000 cu ft) of diesel fuel, giving the ship a range of 20,000 nautical miles (37,000 km; 23,000 mi) at 13.5 knots (25.0 km/h; 15.5 mph) and can stay at sea for up to 90 days.
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