U. S. Sergeant Floyd. Captain McIntyre pulls on a polished bass knob and a bell sounds somewhere below. A deckhand, equipped with a life belt of Mae West mode and hidden from view on the deck below, picks up an 18-foot pole marked with alternate black and white bands a foot wide and expertly pokes it toward the bottom. We are in 12 feet of water, or two fathoms, and his softly spoken \"Mark Twain
