17th April, 1963 - she was one of the most formidable attack submarines in the world.
Dreadnought was handled by means of telemotor controls, using a type of joystick and elaborate instrument panel similar to those in the cockpit of a modern aircraft. At high underwater speed she also behaved and handled like an aircraft and could be set on course and depth by an 'automatic pilot'. She was also capable of performing 'aquabatics'.
Comprehensive air-conditioning and purification equipment maintained safe and comfortable atmosphere control and enabled Dreadnought to operate for more than two months without recourse to air from the surface - a pint of distilled sea-water an hour, passed through electrolysers, providing enough oxygen for
