Hi
I cannot remember any pistols stored in bulkheadbrackets like on the type IXC- U 190. I guess we normally (in peace time at least) would have stored everything related to this in ammostorage compartment like the ammostorage below COs quarter. Again reloading the tubes with torpedoes having warheads with pistols fitted was not done very often in peacetime we mostly used dummytorpedoes for training. It migth be we would have done it differently in wartime but as I previously said I believe you would have time to fetch them from the ammocompartment when reloading. But I really don`t know as you know it was not my business.
Tore, I think you are right - on type VIIC boats the pisols were not stored in that way - mainly because of lack of space. They could be stored in the munition room, below quaters, together with demolishion charges and ammo for the guns.
The brackets from the photo above were used to hold the canisters for the Pi-1 and Pi-2 pistols (as on this photo of the U-190 forward torpedo room, at backboard).
Similar canister can be visible on attached photo (U-826 after surrender, while disarming, probably in Loch Lisahally or Loch Ryan). Second photo presents the Pi-2 pistol (combined impact and magnetic type) itself.
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Regards
Maciek