I was looking for an Sub simulation and remembered playing Red Stom Rising and was woundering if this games was maybe coming down the line.....

Oh.. I played it A LOT on my C64 (cassette tape). It would be instabuy if GOG releases it...But chances are slim.
On DotEmu you will find SubCommand and 688i Unter Killer.

Same here but had the Floppy Disks. Man I Loved that game. Sigh One can Hope........

I remember if you wanted to copy it you had to use turbo nibbler (?). Ah, nvd.

It was developed and published by Microprose but I don't think Tommo acquired it when they bought Microprose assets. And there is also Sea Wolf developed and published by EA but we have't seen here any "new" EA's game for a long time. The problem is that sim games audience is rather limited and such games do not generate lots of $ :-(

How picky are you about graphics?
http://www.subsim.com/radioroom/showthread.php?t=202304

There is this GNU U-boat sim in developement.

http://sourceforge.net/projects/dangerdeep/?source=directory