Torpedo detonator switch is not realistic

[Cpt.Nautilus]

In SH3, on the TDC, there is a switch allowing you to change the torpedo detonator in a single click. However this seems to be grossly unrealistic. Here is what I found in Doenitz's memoirs (chapter 7, p.88, translated by R.H. Stevens):

The change-over of the pistols was always a task accompanied by much wearisome and often quite impracticable re-loading of torpedoes.

Above, p.86, he tells he issued the following order, during the Norwegian campaign:

In Zone O and further north, load three torpedoes with settins A (impact) and one torpedo with magnetic firing setting.

So, it seems that to change this setting, you need to unload and reload the torpedo. Could it be modded into SH3?