Submarine is a 759 piece escape puzzle by Ravensburger measures about 27 x 20" when completed (70 x 50 cm).

While exploring the harbor of San Juan in Puerto Rico, you notice an old man pottering around on a mysterious vessel. As you get closer, he greets you and tells you about his homemade submarine. He built it, he says, to be able to look for sunken wrecks in this area. Unfortunately, he is now too old to take the submarine down himself. When he offers you the opportunity to take a dive you excitedly agree. You listen as he quickly explains how everything works, you get on board, and dive down.

Shortly after diving below the surface, something goes wrong: the old boat breaks down and you sink, out of control, to the seabed. The main pressure line has blown and the engines have quit running. How will you survive? Piece together the 759 pieces and answer the riddles to save your life!