I have found the MOSS is a great way of diverting attention away from your sub.
The best way to use them is to fire one in the general direction of your target, sat 10 to 30 degrees off them (best fired from the torp tube that is on the far side of the target to minimise launch noise to them). Once the MOSS is away, change your depth by 400+ feet, turn your heading away by 20-30 degrees and rig ship for ultra quiet.
If there is a layer present, fire one above the layer and then change depth, heading etc., then go deep, do the same process and try to come up somewhere in between.
The MOSS is great into spooking subs and surface ships before they have fired at you, and they more often than not go after the MOSS, giving you some time to get a better solution on the targets as they increase speed/sound signature.
When combating incoming torps, a similar process applies. Try and launch the MOSS at the same depth as the incoming torp, dive/rise and turn away. If you can increase speed to put some distance between the incoming torp without making too much noise, say 10kts, this will increase your chances of survival.
Glad they included the MOSS in the game, just makes it more realistic and exciting.
Good luck!
