I have updated 'Submarine Sabotage' to release 3. This update fixes a few small bugs, including the one that placed the Atlantic Ocean off the coast of Alaska. D'oh! There are lots of little changes, including more synonyms, replacement of some of the default system messages and some optimisations to reduce the file size for 8-bit systems. There are no changes to the game play.

The source code is now available on my GitHub page for anyone that would like to see how the game works. This is NOT public domain and may only be used for learning purposes. The GitHub page also has a map and solution if you get desperate, but the game is really easy, so you shouldn't need those. Don't forget that you can type HINT within the game if you get stuck.