The Challenger Deep, which is named after the British Royal Navy survey vessel HMS Challenger, has a maximum depth of approximately 10,984 meters (36,037 feet) below sea level.

Mapping the Deep is available in paperback (ISBN: 9781589487888, US$26.99) and as an ebook (ISBN: 9781589487895, US$26.99). This book can be obtained from most online retailers worldwide.