By Chris Frame and Rachelle Cross

The History of Man's Battle With the World's Toughest Ocean

The life of the Third Reich's highest scoring U-boat commander

Diving to the Queen of the Deep 1985 - 2010

In The Royal Marines and the War at Sea 1939 – 45, military and naval historian Martin Watts records how marines fought at sea, their relationship with the Royal Navy, and the overall contribution they made to victory in the Second World War.