Shotline Diving Wreck Profile
- Name: Seadeucer
- Type: Dive Boat
- Year Built: 1988
- Builder: Picton, Ontario
- Dimensions: Length 26.2 ft (8 m); Beam; Depth of hold
- Registered Tonnage:
- Location: Off Simcoe Island, near Kingston, Ontario
- Official Number: 50E 122372
- Original Owners: John R. Smith, North York, Ontario
Wreck Location Map
Vessel Type
Charter Dive Boat – small, privately operated vessel configured for recreational dive excursions.
Description
Seadeucer was a small Canadian-flagged aluminium dive boat licensed as a pleasure craft, used for commercial charter dive operations in the Kingston area. The boat was 8 metres (26.2 feet) in length and constructed with built-in flotation in its hull. Despite being configured for dive activity and used extensively for such purposes, it was never inspected by federal authorities, nor was it required to have a capacity plate.
The boat embarked from Collins Bay Marina with one operator and nine divers. The divers entered the water at a known dive site near Simcoe Island, moored to a submerged wreck. During reboarding, deteriorating weather conditions, including 1.5 metre (4.9 feet) waves and wind gusts exceeding 30 knots (55.6 km/h), contributed to water entering through the vessel’s open stern. The free surface effect of accumulated water, exacerbated by unbalanced passenger movement, led to the vessel capsizing.
History
The dive charter took place in the early afternoon of July 20, 1996, under seemingly calm conditions, although small craft warnings were in effect. As the dive concluded, rapid weather changes resulted in heavy swells and wind. With the stern door removed for diver re-entry, water flooded the deck, destabilizing the vessel. Despite efforts to rebalance the load and power forward, a sudden shift in weight and water to starboard caused the vessel to capsize.
All ten individuals, including the operator, were thrown into the water. Most wore wetsuits, aiding in flotation and thermal retention. Some divers retrieved safety equipment from inside the capsized hull. Attempts to signal a passing boat failed—red flares proved ineffective in daylight, likely due to sun glare. Two divers swam to shore to seek help, eventually alerting the Canadian Coast Guard, who rescued the remaining group three hours later.
Significant Incidents
- Capsized during a dive charter due to adverse weather conditions.
- All occupants survived; operator treated for mild hypothermia.
Final Disposition
Seadeucer did not sink due to built-in flotation and buoyancy from the fuel tank. It remained overturned at the surface. All passengers were rescued without fatalities, although the operator was treated for mild hypothermia.
Current Condition & Accessibility
Not applicable – vessel remained afloat and was located immediately following the incident.
Resources & Links
[shotline_reference_links slug=”seaducer-50e-122372″ title=”References & Links”]
The Seadeucer incident near Simcoe Island serves as a case study in marine safety oversight, particularly concerning small charter dive vessels. The capsizing was directly linked to structural design (open stern), lack of inspection, inaccessible lifejackets, and underestimated weather risk. It reinforces the need for stringent safety protocols and proper licensing, especially in the Great Lakes where weather changes rapidly.
Legacy Notes & Full Historical Record
This section preserves the original unedited Shotline content for this wreck so that no historical detail is lost as we transition to the new logbook format.
Shotline Diving Wreck Profile
- Name: Seadeucer
- Home Port: Picton, Ontario
- Licence Number: 50E 122372
- Built: 1988, Picton, Ontario
- Length: 8 metres (26.2 feet)
- Vessel Type: Dive Boat
- Flag: Canada
- Owner: John R. Smith, North York, Ontario
- Propulsion: Chevrolet 5.7-litre V8 gasoline motor
- Date of Incident: 20 July 1996
- Location of Incident: Off Simcoe Island, near Kingston, Ontario, St. Lawrence River
- Final Disposition: Capsized; all occupants survived
Vessel Type
Charter Dive Boat – small, privately operated vessel configured for recreational dive excursions.
Description
Seadeucer was a small Canadian-flagged aluminium dive boat licensed as a pleasure craft, used for commercial charter dive operations in the Kingston area. The boat was 8 metres (26.2 feet) in length and constructed with built-in flotation in its hull. Despite being configured for dive activity and used extensively for such purposes, it was never inspected by federal authorities, nor was it required to have a capacity plate.
The boat embarked from Collins Bay Marina with one operator and nine divers. The divers entered the water at a known dive site near Simcoe Island, moored to a submerged wreck. During reboarding, deteriorating weather conditions, including 1.5 metre (4.9 feet) waves and wind gusts exceeding 30 knots (55.6 km/h), contributed to water entering through the vessel’s open stern. The free surface effect of accumulated water, exacerbated by unbalanced passenger movement, led to the vessel capsizing.
History
The dive charter took place in the early afternoon of July 20, 1996, under seemingly calm conditions, although small craft warnings were in effect. As the dive concluded, rapid weather changes resulted in heavy swells and wind. With the stern door removed for diver re-entry, water flooded the deck, destabilizing the vessel. Despite efforts to rebalance the load and power forward, a sudden shift in weight and water to starboard caused the vessel to capsize.
All ten individuals, including the operator, were thrown into the water. Most wore wetsuits, aiding in flotation and thermal retention. Some divers retrieved safety equipment from inside the capsized hull. Attempts to signal a passing boat failed—red flares proved ineffective in daylight, likely due to sun glare. Two divers swam to shore to seek help, eventually alerting the Canadian Coast Guard, who rescued the remaining group three hours later.
Final Disposition
Seadeucer did not sink due to built-in flotation and buoyancy from the fuel tank. It remained overturned at the surface. All passengers were rescued without fatalities, although the operator was treated for mild hypothermia.
Located By & Date Found
Not applicable – vessel remained afloat and was located immediately following the incident.
Notmars & Advisories
No formal obstruction notices or long-term wreckage reported. However, this incident highlights critical advisories:
- Boats must have accessible life-saving equipment.
- Operators must heed full marine weather forecasts, not just local radio.
- Flares must match visibility conditions (e.g., use orange smoke in daylight).
- Boats used for charters should be formally inspected and assessed for capacity and stability.
Resources & Links
- Transportation Safety Board of Canada Report M96C0056 (PDF)
- Save Ontario Shipwrecks – for further safety awareness in dive operations
- Environment Canada – Marine Forecasts
Conclusion
The Seadeucer incident near Simcoe Island serves as a case study in marine safety oversight, particularly concerning small charter dive vessels. The capsizing was directly linked to structural design (open stern), lack of inspection, inaccessible lifejackets, and underestimated weather risk. It reinforces the need for stringent safety protocols and proper licensing, especially in the Great Lakes where weather changes rapidly.
Suggested Keywords, Categories & Glossary Terms
Keywords: Seadeucer, Simcoe Island, Kingston diving, dive boat capsizing, marine accident, Ontario shipwrecks, charter vessel safety, Canadian Coast Guard rescue, Great Lakes diving accidents
Categories: Great Lakes Diving Incidents, Maritime Safety, Ontario Dive Sites, Small Vessel Regulations, 1990s Marine Accidents, Non-Wreck Marine Events
Glossary Terms:
- Free Surface Effect: The destabilizing movement of liquid across a surface (like a boat deck) that reduces a vessel’s stability.
- Cuddy Cabin: A small shelter cabin, typically located forward on a boat.
- Stability Criteria: Technical standards determining how a vessel remains upright in various loading and weather conditions.