DOS Games Discussion

Hi all, im looking for an old CGA color, DOS Naval destroyer game, i played it as a kid on my first PC, back in the mid/late 80's, The basic goals were, to hunt down a submarine, this was done on a grid, with 2 islands, you would use the arrow keys to move around in the grid, every now and then the subs periscope would pop up some where on the game grid. Once you caught up with the sub, the screen would switch to the depth charge screen and you would have to track and depth charge the sub. You gained rank the more missions you successfully completed. I cant remember much else, but one of the screens showed a quote from Admiral Chester Nimitz....

Thanks in advance, any questions please ask it might spark another memory of the game.