Shotline Diving Wreck Profile
- Name: Theano
- Type: Steel-Hulled Bulk Freighter
- Year Built: 1889
- Builder: Slikkerveer, Netherlands
- Dimensions: Length: 241.8 ft (73.7 m); Beam: 36 ft (11 m); Depth of hold: 17.1 ft (5.2 m)
- Registered Tonnage: Gross Tonnage (GT): 1,534; Net Tonnage (NT): 952
- Depth at Wreck Site: 70 m / 200 ft
- Location: Near Trowbridge Island, Lake Superior, Canada
- Coordinates: Three miles east of Thunder Bay, Ontario
- Official Number: BR110350
- Original Owners: Algoma Central Railway (acquired July 1900)
- Number of Masts: Screw-propelled, steel hull, single-deck freighter
Wreck Location Map
Vessel Type
The Theano was a steel-hulled single-deck bulk freighter, purpose-built for transporting heavy cargo, such as steel rails, coal, or grain. Its robust construction and propulsion design reflected late 19th-century advancements in maritime engineering, enabling it to operate in demanding conditions across the Great Lakes and transoceanic trade routes.
Description
The Theano was constructed in 1889 in Slikkerveer, Netherlands, and originally registered in Newcastle, England. It was primarily utilized for cargo transport, reflecting the significant industrial demand of the late 19th century. In July 1900, the ship was acquired by Algoma Central Railway, marking its integration into the growing infrastructure of the Great Lakes shipping trade.
Throughout its operational history, the Theano transported a variety of bulk cargo, including steel rails, which were essential for railway expansion across North America.
History
On November 17, 1906, the Theano encountered its demise near Trowbridge Island. During this ill-fated voyage, the vessel struck Marvin Island, creating a fatal breach in its steel hull along the rocky shoreline. Following this impact, the Theano’s boiler exploded, causing significant damage and propelling the vessel into deep water.
At the time of its sinking, the Theano was carrying steel rails, underscoring its role in supporting regional industrial infrastructure. Fortunately, details about casualties or survivors are not documented, but the incident highlights the inherent dangers of navigating Lake Superior’s treacherous waters.
Significant Incidents
- November 17, 1906: Theano struck Marvin Island, leading to a breach in the hull and subsequent boiler explosion.
Final Disposition
In 2004, the wreck of the Theano was rediscovered in Lake Superior at a depth exceeding 200 feet (70 meters). The steel hull remains remarkably preserved due to the cold, fresh waters of Lake Superior, providing an exceptional site for underwater exploration. The depth and conditions, however, make the wreck accessible only to experienced technical divers equipped for deep, cold-water dives.
Current Condition & Accessibility
There are no current Notices to Mariners (NOTMARs) directly associated with the Theano’s wreck site. Divers must exercise caution due to the significant depth and potentially hazardous diving conditions.
Resources & Links
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The Theano stands as a poignant reminder of the risks associated with early 20th-century maritime transportation and serves as a significant underwater site for exploring the region’s industrial past. Remember to leave only bubbles and take only memories when diving.
Full Wreck Record — complete historical article, construction details, voyage logs, incident reports, dive conditions, and all research sources.
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