Also, try to keep in mind...
The
ONLY reason you need to estimate distance in the solution process is to help determine target speed.
If target speed is known (ie. slow = 6-7 knots) the range is irrelevent in the constant bearing formula, just set it to 1000 and don't worry bout it.
...and you can use the SH3 scope just like a whiz-wheel to calculate AoB for you! (That's why solution for single target in a convoy is good for any ship in the convoy.)
If you have a good idea of target TC and speed, there's really no need for additional target observations to arrive at a firing solution.
I seldomly have to use the stadimeter, but something to keep in mind... you can pause the game and still use it. (hint, hint

)