Dirk Pitt - The son of a senator and a scientist at the National Underwater Marine Agency, this character is a lover of the water and a diving expert.
Commander Felix Dupree - This person is the Captain of the missing submarine Starbuck on her maiden voyage.
Admiral Leigh Hunter - This character is the commander of the Navy's 101st Salvage Fleet, which engages in undercover salvage operations around the world.
Commander Burdette Denver - A member of the staff of the 101st Salvage Fleet, this character is a member of the original team who meets the main character with the communications capsule.
Lieutenant Commander Paul Boland - This character is the Executive Officer of the 101st Fleet Salvage Operation.
Adrian Hunter - This character is kidnapped by the main villain.
Captain Orl Cinana - This character is the officer in Command of the salvage fleet.
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