I just wanted to throw this out there as something helpful for the Mk 37. As slow and somewhat useless as it is against anything not a diesel sub, you can still employ it very effectively. I use the Mk 37 to impose my will on enemy escorts. While almost always slower than the escort, the major thing that the Mk 37 has on its side is closing speed. Even though he is ultimately faster than the torpedo, the escort must take evasive action and head away from the torpedo, otherwise as slow as it is it would still hit him. They key to this is, if you are fairly close to the escort, line it up on manual guidance and then have the torpedo go active, hopefully it will trail him on his exact bearing (so directly behind him) for its entire 10,000+ yard run, forcing him to evade and more often than not leaving whatever he was escorting there as low hanging fruit for the picking. Probability of kill, 0%, probability of Boris Badinoff taking you a lot more seriously, 100%.
The flip side is, you've most likely just attracted a lot of attention and ASW Aircraft are likely on their way....
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