As far as I understand, a captain would get a speed and AOB estimation from his 1WO and 2WO, estimations that often differed. Then it would be up to the captain to decide which estimate was right, or to use his own.
SH3 doesn't offer that.
You can get a fairly good range estimate from your hydrophone. It's not spot on, but it's good enough.
Or, if you're close enough and have map contacts on, you can just look at the map and the ship will be placed. Use a ruler to get the distance. That's pretty good.
Of course when people start with a "hardcore range finding" that usually means that they want to do it the hard way to prove something to themselves or others.
Good luck with that.
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