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Case file

USS Cyclops, March 1918

A Navy collier that sailed from Barbados and was never heard from again.

How this site works. Every fact is in our own words and linked to its source, beside it. The pictures are our own drawings. We remember that real people died in these events, and we stick to the records.

She vanished with all hands in early March 1918, on her way back from Brazil. US Navy Museum

Her wreck has never been found, and the cause of her loss remains unknown. US Navy Museum

The ship

USS Cyclops was named after the one-eyed giants of Greek myth. DANFS

She was a collier, a coal-carrying fuel ship, launched on 7 May 1910 by William Cramp and Sons of Philadelphia. DANFS

She was 542 feet long, displaced 19,360 tons and had a complement of 236. DANFS

She helped carry refugees from Tampico, Mexico, to New Orleans. DANFS

She was commissioned on 1 May 1917, when the U.S. entered the First World War. DANFS

The last voyage

In 1918 she sailed to Brazil to refuel British ships in the South Atlantic. DANFS

She left Rio de Janeiro on 16 February 1918, called at Barbados on 3 and 4 March, and was never heard from again. DANFS

USS Cyclops’s last known voyage (our rough sketch, from the Navy’s ship history).Drawing: our own, simplified and not to scale

The search

Many ships searched for her. At first she was thought to have been sunk by a German submarine. US Navy Museum

Britannica says she went missing in the Bermuda Triangle area; there were no survivors. Britannica

The official Navy ship history calls her loss one of the sea’s unsolved mysteries. DANFS

Case file BT-1918 Open

What is known

She left Rio de Janeiro on 16 February 1918, called at Barbados on 3 and 4 March, and was never heard from again. DANFS

Her wreck has never been found, and the cause of her loss remains unknown. US Navy Museum

Our opinion

Our view: Cyclops is a genuine mystery, in the sense that nobody knows what happened. That is not the same as a mysterious force. Ships were lost at sea in wartime and in storms long before anyone drew a triangle.

Next: the evidence →