On January 26th 1932 one of the most unique submarines in Royal Navy service, HMS M-2 left Portland for an exercise in West Bay off the Dorset coast. What made this vessel unique was that she was able to launch a single Peto light observation aircraft. At 1011hrs the submarine signalled that she was beginning her dive. Just over an hour later a passing merchant ship observed a submarine diving stern first but the crew, unfamiliar with how submarines worked, failed to realize just what they were seeing – the sinking of HMS M-2.
For more on the history of this unique vessel and Britain’s efforts to develop a submersible aircraft carrier CLICK HERE