Radio Contact Intercept Part 2
Time 17:50
We're on station, set speed zero. Let's not give ourselves away; wait til the hydro bearing is reading about 30° before popping up the scope for a peek. Wait for it...
Time 17:53
...wait for it... good he's on about the 30° beam. Let's take a peek.
Yep, he's right where we expected him to be.
Yeah... just a little guy...

Make ready tube 1, depth 4, set pistol for side impact.
Aye sir
Time 17:54
Open tube 1
Tube 1 open
I'm looking for a low gyro angle shot... let's aim for his stack and fire when it reaches the 20° bearing.

Notice how the TDC is adjusting itself automatically now for where I aim. With the scope pointed at 20° you can see the torpedo path is running nearly straight (close to 0-gyro angle). See how the AoB adjusted for my 20° bearing aim... it's like a whiz wheel AoB solver, I don't have to guess at it.
Time 17:55
Torpedo 1... LOS!
Time 17:56
Torpedo Impact... YAAAAYYY!
Hmmmm, we were off a few degrees there to the stern. Wolf you might've been right about that extra tenth of a knot afterall. Ahead standard, surface the boat.
Time 18:03
She's going down sir...
Very good Wolf... stand down the gun crew. Note the time of sinking.
Time 18:05