Porte-class gate vessel
| Class overview | |
|---|---|
| Name: | Porte class |
| Operators: |
 Royal Canadian Navy ⁄ Canadian Maritime Command
|
| Preceded by: | Battle class |
| In commission: | 5 December 1951 – 19 December 1996 |
| Completed: | 5 |
| Retired: | 5 |
| General characteristics | |
| Type: | Boom defence vessel |
| Displacement: | 429 tons |
| Length: | 125 ft 6 in (38.25 m) |
| Beam: | 26 ft 4 in (8.03 m) |
| Draught: | 13 ft (4.0 m) |
| Propulsion: | 1 Diesel engine, 1 shaft 600 bhp (450 kW) |
| Speed: | 11 kn (20 km/h) |
| Complement: | originally 3 officers, 20 ratings; later expanded to 5 officers, 3 officers under training, 30 ratings |
| Sensors and processing systems: |
|
| Armament: | 1 x 40mm Bofors single mount (later removed) |
The Porte-class gate vessels were a class of boom defence vessel operated by the Royal Canadian Navy (RCN) and Canadian Forces (CF) during the Cold War.
The class derived its name from the gates of the French fortifications of Québec and Louisbourg and was designed by the RCN as a replacement for World War I-era Battle-class trawlers used to operate anti-submarine booms during World War II. The Porte class were used primarily as training vessels during the Cold War.
The Porte class were designed with the possibility of commercial adoption of the design by the Canadian fishing industry. The gate vessels were planned for use as auxiliary vessels during peacetime. Of a trawler design, the Porte class were to operate the anti-submarine booms for harbour defence. They were also capable of being fitted for minelaying.
The Porte class were 125 feet 6 inches (38.25 m) long with a beam of 26 feet 4 inches (8.03 m) and a draught of 13 feet (4.0 m). They displaced 429 tons fully loaded and had an initial complement of 3 officers and 20 ratings. The Porte class were powered by one diesel engine driving one shaft creating 600 brake horsepower (450 kW). This gave the vessels a maximum speed of 11 knots (20 km/h; 13 mph). The ships were armed with one 40 mm gun.
The first Porte-class vessel was ordered September 1949.Porte Saint Jean and Porte Saint Louis were based at Halifax, Nova Scotia and Porte Dauphine, Porte Québec and Porte de la Reine at Esquimalt, British Columbia. From 1958-74, Port Dauphine was loaned to the Department of Transport as an environmental research ship on the Great Lakes.
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