Case file · Anomaly hotspot
USS Proteus vanishes
The collier USS Proteus, sister of the lost Cyclops, left St Thomas in the Virgin Islands on 23 November 1941 with a cargo of bauxite and disappeared with all 58 crew.
1941 CE · 18.34, -64.93 · status: unexplained
The account
Her sister Nereus vanished on the same route weeks later. Both are listed in Bermuda Triangle books.
The sceptical view
Both were old, heavily loaded ships of the Cyclops class, which had a known structural weakness; bad weather or German submarines may also have sunk them. Researchers found no U-boat claims.
The researched reading
An old, heavily laden ore carrier lost in winter seas. Structural failure is the strongest explanation, with an unrecorded submarine attack a lesser possibility.
| Explanation | Weight | Why |
|---|---|---|
| A known natural phenomenon | 40% | An aged collier carrying dense bauxite in heavy weather is prone to structural failure; the class is believed to have had a weakness in its longitudinal beams, worsened by corrosion and dense ore cargoes, and a ship breaking up sinks too fast for a distress call. |
| Something known, misidentified | 18% | By 1941 she was a privately operated merchant ship more than 25 years old; overloading, poor maintenance or cargo shifting are ordinary causes. |
| Secret human technology | 14% | German submarines were active in the region in 1941–42, but no U-boat claimed her; a mine or unrecorded attack cannot be excluded. |
| Perception, memory or mind | 10% | The loss of all three Cyclops-class sisters became a Bermuda Triangle motif. |
| Undetermined | 8% | The share a generic explanation had beyond what has been shown for this case: it fits many cases like this one, but has not been demonstrated for this one. |
| A poorly understood natural phenomenon | 4% | Rogue waves, now known to be real, can break ships; they are a natural explanation rather than a mystery. |
| A hoax or fabrication | 3% | No fabrication in the core facts. |
| Genuinely anomalous | 3% | Structural failure in a known weak class explains the loss. |
Official position: No formal finding of cause; she was declared lost with all 58 crew.