Another game based on a game in Tim Hartnell's book "THe Big Fat Book of Computer Games".
Sea Wolf is a Convoy v Submarine game, set post WW2. You play the Convoy (and Escort) while the 'computer' plays the submarine.
I had a lot of trouble GUI-ifying this game, until I hit on the "obvious" solution of simply making it event-driven. In the original (basic) text game the player decides whether to move their Convoy, then whether they use the Convoy's sonar, then whether the Convoy will attempt to shoot at the Submarine - then all that is repeated for the Escort.
In my version, the player places their Convoy and Escort, then can do any of the options, using either ship, which made it much less irritating.

As before, I am including the (scanned) original BASIC code.
enjoy.
S.