HMS Onyx
Ship Number
1141
Vessel Type
Algerine Class Minesweeper
Built
Belfast
Slip Number
10
Launch Date
October 27, 1942
Launched By
Miss Blair
Delivered
March 26, 1943
Owner
Admiralty
Weight
1053 grt
BP Length
212-15 feet
Breadth
35-14 feet
No. of Screws
Twin
Speed (approx)
16.5 knots
Propulsion
Parsons Single Reduction Geared Turbines 2000 SHP
Official No.
Registered
Fate
Scrapped
HMS Onyx

Pennant No. J221
 
These were the largest minesweepers ever built for the Royal Navy, and were frequently used as escort vessels during World War II.
 
The reason was that they were designed to combat every single type of mine around. They were 40 feet longer and 7 feet beamier than the previous "Bangor class", the design was so successful, it continued right through the war until the cessation.
 
Scrapped on 5 April 1967.