archeosousmarine.net · Historical Research
Historical wreck fiche for the U171 off Groix.
Dive Spot Guide•
Sous marin U171
Advanced deep submarine wreck off Groix.
Boat-access wreck dive off Groix with variable visibility and current, best handled as a serious advanced profile rather than a casual tour.
About Sous marin U171
Sous marin U171 is a deep World War II submarine wreck off Groix, resting across rocky plates and blocks with the conning tower standing out as the main landmark. The dive is advanced and atmospheric, with changing visibility and current, and it is better treated as a serious wreck profile than as a casual sightseeing dive.
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Research Estimate At Sous marin U171
Conservative baseline from public research. No community dives logged yet.
AccessChallenging entry effort
Aquatic LifeSome life
FacilitiesBasic facilities
CurrentModerate current
SurgeLight surge
Where Is Sous marin U171?
Community sourced coordinates.
Featured Operators
Loading local operators…
Sous marin U171 Planning Details
Depth range, seasonality, and planning context.
Reported Depth
38m - 40m
Depth Note
Reported around 38 to 40 m, with the conning tower rising about 7 m above the wreck.
Best Season
Late spring to early autumn
Typical Conditions
Atlantic wreck conditions are variable, with visibility and current changing from day to day.
Safety & Access At Sous marin U171
Site conditions, restrictions, and access requirements.
Site Conditions
Strong currentLow visibility
Safety Notes
Stay outside the wreck, plan for variable current and visibility, and treat the site as a deep advanced dive with strict gas management.
Access Restrictions
Interior penetration is forbidden; wreck diving should stay outside the hull.
Legal Notes
Treat the wreck as a memorial and follow local penetration rules and operator briefings.
Local Intel For Sous marin U171
Community notes to help plan your visit.
Scuba Diving
A deep wreck dive around 38 m, with a notable conning tower rising about 7 m.
Freediving
Not a freedive site.
Snorkeling
Not a snorkel site.
Wildlife at Sous marin U171
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Sous marin U171
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Sous marin U171
Average conditions based on logged dives & visits.
No community dive data has been logged here yet. Be the first to record a dive and seed the averages.
