Enter into a naval battle against your computer. But watch out, your adversary is not stupid!

...Our intelligence sources indicate the composition of the enemy fleet is the same as our own, and has likewise been forced to resort to the same tactics as ourselves. In accordance with the rules of war, fire will be exchanged one shell at a time and vessels lost will be announced immediately...

...As per your orders you have been placed directly in command of the fleet's guns. Select the target location by clicking in the left-hand grid above. The right hand grid shows the status of our own fleet. Information as to the remaining strength of the enemy will be relayed directly to your status bar...

...We believe this battle will not be over until one or other fleet is sunk in it's entirety. Our gunners await your commands. We're counting on you, Sir..."