My Life as a Torpedo Test Target by Bill Myers

Forty feet underwater with a million dollars of gold in reach, Wally McDoogle only has to overcome: Sea monsters. . . Hostile pirates. . . A ghost ship. . . And, of course, the world famous McDoogle klutziness.

Will he be able to avoid catastrophe and chaos? Probably not.

Just as our hero goes for the gold, he finds himself on a wild ride atop a misguided torpedo and realizes the true cost of greed.