After the war, the A Class, and other submarines, were fitted with a 'Snort' (Schnorkel) mast, which was a device by which air could be taken into a submarine so that it could continue to use its diesel engines when submerged. To demonstrate the effectiveness of the system, the Vickers-built HMS Andrew completed a record 15-day, 2500-mile submerged passage from Bermuda to England. She surfaced in the English Channel on the eve of the Coronation in 1953, just in time for the feat to be reported in the same news bulletin as the first ascent of Mount Everest.
