We will report the peacetime submarine disasters, one year at a time, in our KTB Magazine.

In 1907, four submarines were lost in peacetime. They were:

11 January 1907, the 160 ton French submarine ALGERIEN sank in 40 feet of water in the Cherbourg dockyard. Careless mooring of the boat in the dockyard, a change in tide caused the boat to tilt and water poured in through open hatches. The crew was ashore, so no one was lost. The boat was raised.

19 June 1907, the 31 ton French submarine GYMNORE sank dockside while filling the ballast tanks – someone got the orders wrong, and the boat filled and sank, taking two men down with her. The boat was later raised.

5 July 1907, the 73 ton French submarine BONITE sank in her dock during tests to determine the watertight integrity of the boat. As one might expect, it failed the tests. No one was lost and the boat was raised.

6 August 1907, the French submarine CASTOR sank dockside from unknown reasons. No one was lost, and the boat was raised.

Below is a running tally of submarines lost in peacetime, which will be updated monthly as we look at other submarine disasters.

England – 3 France – 7 Russia – 1