NBM Dive Site Resource
Steven M. Selvick
Munising, Michigan, United States
A 71-foot steel tug intentionally placed in the Alger Underwater Preserve, now lying on its side as a popular wreck dive and fish habitat.
Save this dive site to your free member profile.
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.
Seasonal planning reference
Typical monthly conditions
Long-term averages, not a forecast. Actual air and water conditions can change quickly and may vary across the site.Moderate-confidence match — Matched by documented Great Lakes port/area. Air and surface-water values are regional planning averages. No bottom-water line is published because a comparable depth-specific record has not yet been verified.
| Month | Average air | Surface water | Bottom water | Bottom measurement depth |
|---|---|---|---|---|
| Jan | 14.3°F / -9.8°C | 36.7°F / 2.6°C | No reliable record | — |
| Feb | 15.8°F / -9.0°C | 34.9°F / 1.6°C | No reliable record | — |
| Mar | 25.0°F / -3.9°C | 36.6°F / 2.6°C | No reliable record | — |
| Apr | 36.8°F / 2.7°C | 36.8°F / 2.7°C | No reliable record | — |
| May | 50.6°F / 10.3°C | 36.4°F / 2.4°C | No reliable record | — |
| Jun | 60.7°F / 15.9°C | 38.2°F / 3.4°C | No reliable record | — |
| Jul | 65.3°F / 18.5°C | 44.6°F / 7.0°C | No reliable record | — |
| Aug | 63.6°F / 17.6°C | 55.7°F / 13.2°C | No reliable record | — |
| Sep | 56.3°F / 13.5°C | 55.4°F / 13.0°C | No reliable record | — |
| Oct | 43.5°F / 6.4°C | 49.2°F / 9.6°C | No reliable record | — |
| Nov | 30.8°F / -0.7°C | 43.4°F / 6.3°C | No reliable record | — |
| Dec | 20.2°F / -6.6°C | 39.9°F / 4.4°C | No reliable record | — |
NOAA NCEI 1991–2020 U.S. Climate Normals — Marquette, MI
1991–2020 climate normalsReview source ↗NOAA NCEI Coastal Water Temperature Guide — East Superior
Historical monthly station averagesReview source ↗Bottom temperature is never inferred from surface temperature. A blank month means no reliable depth-specific average is available. Data reviewed 2026-08-26.
Why divers know this place
Highlights
Accessible pilot house beginning around 40 feet, intact tug features and fish habitat.
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
- Steel tug
- Year sunk
- 1996
- Vessel length
- 71 ft
- Cause of loss
- Intentionally sunk as a dive attraction
- Wreck orientation
- On its side
- Present condition
- Intact artificial reef; pilot house begins near 40 feet
- Penetration guidance
- Any entry into the pilot house or enclosed areas requires appropriate overhead training
- Protection or memorial status
- Alger Underwater Preserve
History and significance
The tug, formerly named Loraine and Cabot, assisted with construction of the Mackinac Bridge before being retired and donated to the preserve.
Plan the trip
Dive boats that visit this wreck
Shipwreck Tours lists this among the most popular wrecks it scuba dives and may assign either Hannah Marie or Wreck Express based on the trip.
Open boat profile →Munising, MichiganWreck Express — Munising Shipwreck Dive CharterShipwreck Tours, Inc.Shipwreck Tours lists this among the most popular wrecks it scuba dives and may assign either Hannah Marie or Wreck Express based on the trip.
Open boat profile →Regional context
Located within
Before you arrive
Access notes
Confirm the selected wreck, departure, current conditions, mooring status and diver requirements directly with the operator. Published coordinates support regional discovery and are not a substitute for current navigation, active mooring information, operator guidance, permits, weather, or a dive plan.
Plan within your training
Conditions and hazards
Cold water, changing visibility, boat traffic, entanglement and fragile or unstable wreck structure. Depth-specific decompression and overhead hazards may apply.
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.