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Originally Posted by lms_oid
Say you have plotted a move of 0.6 nm in 3 minutes. You now know your target is making 0.6 nm each 3 minutes. Since there is 20 times 3 minutes in an hour, your target speed is (0.6 x 20) knots (since 1 knots = 1 nm per hour). So your target speed is 12 knots.
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Thanks you! This should help tonight when I practice a little more. I was using Neal's method of using roughly half the targets max speed with some minor tweaking.
Another thing I found is there is a button in the lower right corner of the position keeper (just to the right of the position keeper/torpedo settings switch). Once you take your range, AOB, and speed and enter them into the TDC, hitting that button will set the TDC to track. In theory, if you are accurate with those three things, the TDC will keep an accurate firing solution and update the torpedo gyro angles continually.
When I'm ready to fire I:
1) raise the scope
2) check if the generated bearing in the TDC matches (or close to it) the bearing from the scope.
3) check to see if the generated AOB in the TDC matches roughly with what I see in the scope.
4) take one last range and submit to TDC and see if the generated range was off.
5) If all those things check out, it's time to shoot!