Pages 7-8. To clarify what the pictures show: unless the monster is wrapping around the board, it only moves one hex at a time.

Page 21. In the Treasure section for "Four Players," the instructions say to choose any six treasures. You really need eight treasures.

General note: Divers are never separated from their submarines. If a submarine is sent back to port, any divers outside the sub at that time are returned to the submarine layout card. When playing the Sink 'Em variation, divers are removed from the game when the submarine sinks.