On the seafloor along the southern and eastern coasts of the
UK, Dunkley and three other divers have found one of the largest graveyards in the world's oceans, with 41 German and three English submarines from
World War I. Most of the submarines sank with their crews still on board, causing many sailors to die in horrific ways, either by drowning or suffocating in the cramped and airtight submarines.
