In the '68 campaign you can get away with running down a surface group IF (big important capital if) you can avoid being detected. In the Skipjack, which is probably the noisiest US sub, you can steal an approach with some careful sprinting, followed, by slowing to check position. Go as deep as you can, preferably under a hard layer, and set the throttle to standard. In the Skipjack this will be 20kts. Give it an 8-12k yard run, then rig for ultra-quiet and regain contacts. The safest option is to do this from the baffles, but it will longer. A 45 degree intercept works reasonably well, as you can turn into the groups baffles as you get closer.
If you can close to less then about 3k yards, fire off all 6 tubes in a nice wide spread, and watch the carnage.
If you have a fleeing transport, send a MK37 down their track (preferably straight from behind, IE pure lag pursuit). Even at run out speed the MK37 has a few knots of overtake, however you run the risk the range being exceeded if the initial launch is more than about 2,500 yards off. Go ahead and enable it ASAP, this will extend it's overtake range to about 8k yards. I've managed to chase down quiet a few sub tenders this way while I dealt with the escorts. If you can get a shot from dead astern a MK16 can run a transport down from about 7,300 yards. Shoot a tight spread as it's hard to get it all lined up perfect, and it's sole crushing to watch a transport have torpedo's slip by it by the narrowest of margins.
-Jenrick
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