NBM Dive Site Resource
U-246
Port St Mary offshore, Isle of Man / Anglesey offshore, Isle of Man
A diver-documented Type VIIC submarine wreck between the Isle of Man and Anglesey, visited during a July 2022 memorial expedition. The published dive reached approximately 50 m. Current conditions and access are not verified.
Save this dive site to your free member profile.
Featured Hero Photograph
Aquatic life at this dive site
What divers may encounter
Three reviewed connections are featured here. Sightings vary by season, conditions, and chance, so they are never guaranteed.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Aquatic life research in progress
NBM is reviewing a likely local species for this position.
Site media
Photographs
Three views rotate from the published gallery on each visit.
Contributor media
Dive videos
Three featured video positions are reserved on every profile.Regional location and nearby land
Location map
Regional map around Irish Sea between the Isle of Man and Anglesey, including nearby land. No precise navigation point is inferred from the historical loss account.Map data © OpenStreetMap contributors
Recent field observations
Diver-reported temperatures
Automatically checked observations from dives during the past 14 days. Three reports are visible at a time; scroll for more.A report that passes the automatic checks will appear here with the dive date, diver’s display name, and temperatures at each depth.
Reports are automatically checked for plausible dates, depths, and temperatures. They are observations, not forecasts; confirm conditions before diving.
Why divers know this place
Highlights
Type VIIC wreck and memorial plaques commemorating its lost crew.
Shipwreck-only module
The wreck
This section appears only on shipwreck records and brings the vessel, its loss, present condition, access, and responsible wreck-diving considerations into one place.
- Vessel type
- German Type VIIC submarine
- Year built
- 1943 (launched)
- Year sunk
- 1945
- Cause of loss
- Sunk by HMS Lady Madeleine on March 17, 1945, according to the revised service record.
- Present condition
- Diver-documented submarine wreck; no new condition survey by NBM.
- Penetration guidance
- External wreck context only; no penetration or artifact recovery authorization is implied.
Before you arrive
Access notes
The documented visit departed from Port St Mary. It establishes prior diving, not a current charter schedule or access permission. Confirm present conditions, tidal windows, support and any restrictions before planning.
Plan within your training
Conditions and hazards
Depth, decompression, tidal currents, offshore sea conditions, fishing gear and damaged metal. Respect the site and any human remains.
Independent resource notice
This record is a starting point for independent verification. Access, closures, moorings, weather, currents, depth, visibility, operator availability, and site conditions can change without notice. Confirm current information with the responsible operator, property owner, managing authority, or another qualified local source before planning or attempting a dive.