depends what period, up to 1970, the US was playing catchup.
WW2 submarine torpedoes, once the targeting/reliability problems were resolved in 1943 were decent, but not as performing as the more advanced japanese and german models. The MK16 we have in game is perfectly decent, but is basically just a more reliable WW2 era weapon.
The MK37 design was perfectly fine as a anti-submarine torpedo when it was issued in the early 50s. remember it was designed when only diesel-electric subs were around with a top underwater speed of 7-8 knots. In WW2, the MK24 FIDO acoustic torpedo managed to sink/damage 55 German/japanese subs even though it only had a top speeed of 12 knots.
The MK37 only became obsolete because the Soviets started using SSNs with a top underwater speed of 30-42 knots. However, once the MK48 came out, the US had a torpedo that was perfect for ASW work.
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