HI,
here are a few videos.
Only the firing solution can be seen here and how the devices are used.
It should be clear how AOB, speed and distance are determined.
Solution on the map
https://www.level65.de/lvl0/uboat/vi...locked_map.mp4
Peri UI and Torp UI
https://www.level65.de/lvl0/uboat/vi...ed_Torp_UI.mp4
Ship locked and TDC view
https://www.level65.de/lvl0/uboat/vi..._Torp_44kn.mp4
Ship not locked and TDC view
one torp
https://www.level65.de/lvl0/uboat/vi..._Torp_44kn.mp4
two torps (called "Mehrfachschuss", not salve)
https://www.level65.de/lvl0/uboat/vi..._Torp_44kn.mp4
EDIT:
And one more hint ;-)
You can also enter the values manually in the Peri/UZO UI and transfer them to the TDC. These have a green background in the display.
But, these values will
NEVER be updated by another officer. Who would argue with the skipper!

You must be aware of this!
For an officer to update your manual values again, you must delete them. The officer will then know to take care of the firing solution or this parameter again.
Cheers Ruby