I applied Redwine's mod to remove sealife (seaweed, plankton, etc) and I gained a few framerates. Now I can play the game reasonably well.
Can anyone supply a mod to totally remove the sea junk?
Here's the link to Redwine's "Increased Underwater Visibility" mod-
http://www.subsim.com/radioroom/showthread.php?t=108964
Yours, Mike