NBM Dive Site Resource
Oconto
American Narrows / Thousand Islands, New York, United States
TECHNICAL DIVE ONLY — Oconto is a St. Lawrence River wooden propeller steamer reaching approximately 180 ft / 55 m. NOAA classifies the wreck as technical diving; depth, darkness and strong shipping-channel current require specialized training and planning.
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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
Broken wooden propeller steamer with bow upright, stern inverted, twisted anchors and surviving propeller structure.
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
- Wooden propeller steamboat
- Vessel length
- 142 feet
Before you arrive
Access notes
Technical dive only in an active international shipping channel. Use an experienced local operator and confirm current, vessel traffic, descent/ascent route, gas and decompression plans. Published coordinates are planning references, not a substitute for current navigation.
Plan within your training
Conditions and hazards
Strong and variable current, active commercial shipping, depth, darkness, decompression obligations, cold water, entanglement, zebra mussels, sharp or unstable wreckage and difficult descent/ascent. Penetration requires separate training and a site-specific plan.
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.