CCGS Sir William Alexander
.JPG)
CCGS Sir William Alexander near Halifax Harbour
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| History | |
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 Canada
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| Name: | Sir William Alexander |
| Namesake: | Sir William Alexander |
| Operator: | Canadian Coast Guard |
| Port of registry: | Ottawa, Ontario |
| Builder: | Marine Industries, Tracy, Quebec |
| Yard number: | 451 |
| Launched: | 23 October 1986 |
| Commissioned: | 13 February 1987 |
| In service: | 1987–present |
| Refit: | 1998 |
| Homeport: | CCG Base Dartmouth (Maritime Region) |
| Identification: |
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| Status: | in active service |
| General characteristics | |
| Class and type: | Martha L. Black-class light icebreaker and buoy tender |
| Tonnage: | |
| Displacement: | 4,662 long tons (4,737 t) full load |
| Length: | 83 m (272 ft 4 in) |
| Beam: | 16.2 m (53 ft 2 in) |
| Draft: | 5.8 m (19 ft 0 in) |
| Ice class: | Arctic Class 2 |
| Propulsion: |
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| Speed: | 16 knots (30 km/h) |
| Range: | 6,500 nmi (12,000 km) at 13.7 knots (25.4 km/h) |
| Endurance: | 120 days |
| Complement: | 26 |
| Aircraft carried: | 1 × MBB Bo 105 helicopter |
| Aviation facilities: | Helicopter flight deck and hangar |
CCGS Sir William Alexander is a Martha L. Black-class light icebreaker. Entering service in 1987, the vessel is currently assigned to CCG Maritimes Region and is homeported at CCG Base Dartmouth, in Dartmouth, Nova Scotia. The vessel is named after Scottish explorer Sir William Alexander, 1st Earl of Stirling, who was an early colonizer of Nova Scotia.
Designed as a light icebreaker and buoy tender, Sir William Alexander and sister ship CCGS Edward Cornwallis differ from the rest of the class by having one less deck in the superstructure and their buoy-handling derricks mounted forward. Sir William Alexander had her derricks replaced by a crane in 1998.Sir William Alexander displaces 4,662 long tons (4,737 t) fully loaded with a gross tonnage (GT) of 3,727.2 and a net tonnage (NT) of 1,503.0. The ship is 83.0 metres (272 ft 4 in) long overall with a beam of 16.2 metres (53 ft 2 in) and a draught of 5.8 metres (19 ft 0 in).
The vessel is powered by is propelled by two fixed pitch propellers and bow thrusters powered by three Alco 251F diesel-electric engines creating 8,847 horsepower (6,597 kW) and three Canadian GE generators producing 6 megawatts of AC power driving two Canadian GE motors creating 7,040 horsepower (5,250 kW). The ship is also equipped with one Caterpillar 3306 emergency generator. This gives the ship a maximum speed of 16 knots (30 km/h). Capable of carrying 784.0 long tons (796.6 t) of diesel fuel, Sir William Alexander has a maximum range of 6,500 nautical miles (12,000 km) at a cruising speed of 13.7 knots (25.4 km/h) and can stay at sea for up to 120 days. The ship is certified as Arctic Class 2.
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