U-boat for VIC and 64, starts out quietly enough, but don't be lulled into a false sense of security. Without warning, you'll be called upon to use all your wits to save yourself.
As you calmly patrol the ocean floor, the serenity is soon broken by the sudden explosion of a depth charge.
U-boat was written by Mark Vitek and published as type-in source code in Compute! Issue 42, November 1983.