NBM Dive Site Resource
Thumb Area Bottomland Preserve
Michigan Thumb, Michigan, United States
A broad Lake Huron shipwreck preserve around Michigan’s Thumb with many known losses and continuing discoveries. This area card does not identify one exact dive site.
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Historic Picture Placeholder
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.Published reference location
Location map
The marker shows the public coordinates associated with this profile. Confirm current access, moorings, and departure details before the dive.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
Michigan Underwater Preserves reports at least 22 major shipwrecks in and around the Thumb Area preserve.
Dive-area module
Area coverage
This profile represents a preserve, sanctuary, park, or regional dive area rather than one underwater site. The sourced inventory below links to the named sites documented within its boundaries.
Official inventory
Dive sites within this area
These named sites come from an authoritative preserve, sanctuary, park, or historical inventory. Their inclusion does not mean every connected boat visits them.
TECHNICAL DIVE ONLY — Albany is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 140 feet.
Open dive-site profile →ShipwreckArcticMichigan Thumb, Michigan · 131 ftTECHNICAL DIVE REQUIRED FOR THE DEEPER SECTIONS — Arctic is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 131 feet.
Open dive-site profile →ShipwreckBerlinMichigan Thumb, Michigan · 8 ftBerlin is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 8 feet.
Open dive-site profile →ShipwreckJacob BertschyMichigan Thumb, Michigan · 8 ftJacob Bertschy is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 8 feet.
Open dive-site profile →ShipwreckChickamaugaMichigan Thumb, Michigan · 32 ftChickamauga is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 32 feet.
Open dive-site profile →ShipwreckConsueloMichigan Thumb, Michigan · 6 ftConsuelo is a documented wreck in the Thumb Area Bottomland Preserve’s official inventory, listed at approximately 6 feet.
Open dive-site profile →Plan the trip
Dive boats that serve this area
Before you arrive
Access notes
Use this regional card to find operators, then confirm the named wreck and current access before planning a dive. This map point is an approximate regional center, not a wreck, buoy, entry point, or navigation coordinate. Open an individual dive-site profile and confirm current information with the managing agency or operator before diving.
Plan within your training
Conditions and hazards
Cold water, wind and waves, currents, boat traffic and site-specific depth require conservative planning.
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.