For the first time ever, television audiences got a look inside the training of Naval Special Warfare, the Navy's Special Operations Command, the Navy SEALS and Special Warfare Combatant Crewman's training.
Despite "atrocious sea conditions", the crew managed to connect a tow line, but when it broke, Crewman Simon Emms went on board the fishing vessel to connect a second line.
Divers raced to the lifeboat, which had hit the water upside down, recovering four bodies and trying without success to revive a fifth crewman who had stopped breathing, the authority said.