If he was right, they would be hauled over the outer reef about fifty yards after the Secatur had cleared the passage. She would probably approach the passage at about three knots and then put on speed to ten or even twenty. At first their bodies would be swept away from the island in a slow arc, twisting and turning at the end of the tow-rope. Then the paravane would straighten out and when the ship had got through the reef, they
