Squirrel Software seem to have a thing about flying balls. First it was golf balls, in Supergolf - now it's cannonballs in Trafalgar.
This isn't as irrelevant a remark as it might seem. The programs have a lot in common. In Supergolf you had to choose your club carefully in order to land your ball in the hole. In Trafalgar you must judge the elevation of your guns carefully to hit your opponent's magazine and blow him up.
Trafalgar is a two-player game, but you can play against the computer if you want to. First side to sink all the other side's ships wins.
Despite the pretty graphics that flash on to the screen whenever two ships enter into combat. Trafalgar is a rather unimpressive game. There is little scope for strategy, and once you've grown tired of calculating trajectories, you might as well eject the tape.