Keeping Busy at the Bottom of a Lake A scuba diver in Wisconsin wants to set the world record for the longest time spent underwater. The record is five days, so Rich Henry is preparing for seven days. Relay divers will bring him new air tanks. Just in case he gets bored at the bottom of Lake Andrea, Henry intends to bring along a waterproof music player and a DVD player. He's also bringing his Palm Pilot -- though it's not clear how he would call or write anybody.