[heartc]

Glad I could help, you are welcome! And as per your other thread, it seems to be working for you now - well, no surprise really, because it works for me, too, and so did it for them iRL.
Of course, you can still plot on the map to your heart's content, but the above method is
a) faster
b) simpler
c) provides feedback about the accuracy of the solution (granted, when plotting from long range on the map and the solution is accurate then the bearings should match as well)
d) is historically accurate (in RL they plotted additionally, but the skipper didn't need the plotting party for shooting, he needed it for an initial speed estimate and to maneuver his boat into a proper position, track escorts etc. Shooting was done from the scope, with last minute changes by the skipper).

Of course people may plot and it is not less historical, that's not what I want to say - but if you are *not* familiar with the method described above you are missing out on the capabilities of the TDC/PK, making life harder than need be which *then* is actually less historically accurate.

BTW: Remember to seek out a specific spot on the ship and keep it in order to compare the bearings. When you use the lock function of the scope, this will of course always be some point midships.
The more those bearings stay the same, the more accurate your solution, the longer the run time of the torp and thus range may be (since error increases with time) for you to still hit the target. Really try to make those bearings keep matching exactly, then your solution is perfect. But in any case, the closer you can get to your target, the better. Then, before you fire, send the bearing one last time to the TDC (via range transmission, as this is the only way bearing will be sent, too) - even if the bearings did drift apart from each other slightly, by making a final bearing correction you will "reset" the error back to zero, and if it was small enough, the torp will probably still hit, just not in the exact spot you took the bearing from.