" previous afternoon. His heartbeat increased as he measured his opportunities of escape if he was discovered. They flat didn’t exist. A swimmer stood little chance of outrunning a pair of personal watercraft with a top speed of thirty miles per hour. Unless they were prepared to come after him underwater, all they had to do was outwait him until he exhausted "

― Clive Cussler , Flood Tide (Dirk Pitt, #14)