Royal Navy battlecruiser HMS Queen Mary
(booms to hold anti-torpedo netting are flush against the hull)
Due to the flawed theories of Admiral Sir Jack Fisher, the Royal Navy’s concept of a battlecruiser proved to be a disaster. Theoretically faster than a battleship but less heavily armoured, battlecruisers were meant as scouts for the main battle fleet. The distinction between battleships and battlecruiser was often forgotten.
The ship was coal fired and it required all of her 42 boilers to come on line for the ship to make her design speed of 28 knots.
After HMS Queen Mary was hit in the forward magazines the entire ship exploded.
In this explosion, caused by faulty design of flashback protectors in British Navy magazines, 1,266 crewmen died. Eighteen survived. Two other Royal Navy battlecruisers, HMS Invincible and HMS Indefatigable, also exploded with almost no survivors.