The Royal Navy's Mystery Submarine
by
Roger Branfill-Cook
Language: English
Release Date: January 21, 2013
The ‘X’ stood for experimental, but it might equally have meant extraordinary, exotic or extravagant, as this giant submarine attracted superlatives – the world’s largest, most heavily armed, and deepest diving submersible of the day. X.1 was a controversial project conceived behind the backs...