After the war, she was transferred to the Royal Canadian Mounted Police (RCMP) and renamed Cygnus and served until being broken up in 1961.

Melville was of the diesel-powered version, being equipped with a 9-cylinder diesel engine driving two shafts that produced 2,000 brake horsepower (1,500 kW).

[4] Melville was singular among the diesel-powered Bangors by being armed with a single quick-firing (QF) 4-inch (102 mm)/40 calibre Mk IV gun mounted forward.

The ship was launched on 7 June 1941 and commissioned into the Royal Canadian Navy at Quebec City with the pennant number J263 on 4 December later that year.

[6] After performing her work ups, Melville was assigned to the Western Local Escort Force (WLEF).

On 3 February Melville began a major refit at Lunenburg which was eventually completed at Halifax on 6 June.