It simulates combat operations aboard the Gato-class submarine USS Growler (SS-215) in the Pacific Theater of World War II.

[2] The player is tasked with chasing Japanese shipping across a 20-sector map while returning for resupply as necessary from a submarine tender.

The game has multiple difficulty levels, the highest of which requires the player to translate mission briefings that are transmitted only as audible Morse Code.

The MS-DOS and Apple IIe versions contain a boss key which replaces the game screen with a spreadsheet.

[5] 1991 and 1993 surveys in the magazine of strategy and war games, however, gave it one and a half stars out of five, stating that "it was adequate in its time, but not exemplary in any regard".