Two of the world's leading shipwreck detectives use state-of-the-art equipment to discover how the Hood battleship was sunk so quickly during World War II.

The 'mighty' Hood was the pride of the British Navy for more than 20 years, revered around the world as the largest and most powerful warship afloat. But when it was sunk by the German battleship Bismarck off the coast of Greenland on 24 May 1941, its end was shockingly swift.