Stickleback-class submarine


The Stickleback-class submarines were midget submarines of the British Royal Navy initially ordered as improved versions of the older s. They were designed to allow British defences to practice defending against midget submarines since it was theorised that the Soviet Union had or could develop such craft.
The Royal Navy developed plans to use these craft to carry a 15-kiloton nuclear naval mine codenamed Cudgel into Soviet harbours. The project was unsuccessful as there were problems finding and paying for the necessary fissile material.

Boats

There were four boats, launched 1954–1955: