CCGS Henry Larsen
St. John's Harbour, 2010
|Namesake:||Henry Larsen RCMP ship captain and arctic explorer|
|Operator:||Canadian Coast Guard|
|Port of registry:||Ottawa, Ontario|
|Builder:||Versatile Pacific Shipyards Limited, Vancouver, BC|
|Homeport:||CCG Base St. John's, NL (Newfoundland and Labrador Region)|
|Status:||in active service, as of 2015[update]|
|Class and type:||T1200 Class|
|Type:||Medium Arctic Icebreaker|
|Length:||100 m (328 ft 1 in)|
|Beam:||19.6 m (64 ft 4 in)|
|Draft:||7.3 m (23 ft 11 in)|
|Ice class:||Arctic Class 4|
|Propulsion:||Diesel electric - 2 × GE AC and 3 × Wärtsilä Vasa 16V32|
|Speed:||16 knots (30 km/h; 18 mph)|
|Range:||20,000 nautical miles (37,000 km; 23,000 mi)|
|Boats and landing
|FRC Zodiac H-733 (Miranda Davit)
|5 × Sailor RT 146 VHF-FM
1 × Collins VHF 251 VHF-AM
|Aircraft carried:||1 × MBB Bo 105 helicopter|
A "Medium Gulf/River Icebreaker", the vessel is named after Henry Larsen, the commander of the Royal Canadian Mounted Police patrol vessel St. Roch which was the first vessel to traverse the Northwest Passage in a single season.
The Canadian Coast Guard has two vessels in their "Heavy Icebreaker" class, and four in the "Medium Gulf/River Icebreaker" class. These are their only vessels capable of year-round operation in the high Arctic. These vessels all have a helicopter hangar and can carry and maintain a Bo 105 helicopter, which is used for logistical purposes, as well as ice-spotting, and search and rescue.
A 2004 voyage of this vessel is the subject of the documentary film "Ice Breaker".
CGS St. John's
Vessels at this base:
- CCGS Louis S. St-Laurent - icebreaker
- CCGS Leonard J. Cowley - multi role
- CCGS Cygnus - patrol vessel
- CCGS George R. Pearkes - icebreaker
- CCGS Ann Harvey
- CCGS Sir Wilfred Grenfell
- CCGS Terry Fox
- CCGS Wilfred Templeman
- Edward Lundquist (2011-02-16). "What do Icebreaker sailors worry about? Overheating!". Maritime Propulsion. Archived from the original on 2011-02-20.
The ship can operate on just one of its three Wärtsilä VASA 16v32 engines, and then add a second or third engine as the thickness of the ice warrants. Thicker ice requires more power, but that means the engines will require more cooling. Even in such a cold environment, however, cooling those engines can be problematic.
- "Update: Denmark's Arctic Assets and Canada's Response — Northern Deployment 2009: Danish Navy & CCG in the High Arctic". Canadian American Strategic Review. September 2009. Archived from the original on 2009-09-12.