Innes McCartney is an historian and nautical archaeologist, specialising in 20th century naval vessels. He lectures widely on a number of associated subjects. A passion for shipwrecks has led to some famous discoveries, including the submarine M1 and the battlecruiser HMS Indefatigable. His previous book, Lost Patrols detailed his uncovering the 121 submarines sunk in the English Channel. He lives and works in Penzance, Cornwall.