Overview
HMS MMS 278 is documented as J778, a member of MMS I 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 J778.
Class and service context
HMS MMS 278 is linked to MMS I 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, Coastal mine warfare, Danlaying, Patrol, and Training. Those roles provide context but do not establish that every ship performed every mission.
Later service and disposition
Wrecked in wartime service.
The associated date is 1944-09-14.
Evidence and limits
Available sources confirm the identity, class relationship, and service details shown above for HMS MMS 278.
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 MMS I class. Shared design history belongs on the class page; this page concentrates on the individual hull where evidence is available.
Sources and further reading
- 105-ft Admiralty-type motor minesweepers (MMS1) (1940-1946) ↗Navypedia · accessed 2026-09-19
- MMS I class Minesweepers ↗uboat.net · accessed 2026-09-19
- Conway's All the World's Fighting Ships, 1922–1946Conway Maritime Press