Overview
HMS Onyx is documented as J221, a member of Algerine class, and in Royal Navy service.
The documented national and naval associations are United Kingdom and Royal Navy.
Identity and construction
The documented identity includes J221.
Class and service context
HMS Onyx is linked to Algerine class. The class page provides shared design history; this page preserves facts that apply to this ship.
The class is associated with the recorded roles of Minesweeping, Convoy escort, Anti submarine warfare, Patrol, and Training. Those roles provide context but do not establish that every ship performed every mission.
Later service and disposition
Later service and final disposition have not been confirmed in the sources reviewed.
Evidence and limits
Available sources confirm the identity, class relationship, and service details shown above for HMS Onyx.
Operational episodes, refits, and crew history are included only when they are supported by evidence tied to this ship.
Class relationship
This ship is recorded as a member of Algerine class. Shared design history belongs on the class page; this page concentrates on the individual hull where evidence is available.
Sources and further reading
- ALGERINE minesweepers, turbine-engined (ALGERINE) (1941 - 1944) ↗Navypedia · accessed 2026-09-19
- Algerine class Minesweepers - Allied Warships of WWII ↗uboat.net · accessed 2026-09-19
- Conway's All the World's Fighting Ships, 1922–1946Conway Maritime Press