Silent Service
It’s a submarine simulation game came out in the late 80s. There are three scenarios that can be played: Torpedo/Gun Practice, Convoy Practice, and War Patrols. In Torpedo/Gun Practice, you sink four stationary, unarmed ships. In Convoy Practice, you choose from six historical convoy actions. In War Patrol, you choose from five historical submarines and sink as many ships as possible.
$8.89