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During surfaced night attacks 1WO was operating UZO at the bridge, tracking and locking targets and finally he was giving command to fire torpedoes, while Kaleun was placed in command room over map, what gives him better view of operational situation.
During submerged day/night attacks Kaleun was sitting in conning tower above command room, operated attack periscope and was giving fire solution and command to fire torpedo.
Obersteuermann marked targets on the map and hydrophone operator informed about audio signals (submerged).
Torpedo calculator during both type of attack was operated by qualified crewmember, the most often by Oberbootsmann (see Das Boot).
During WWII only Kriegsmarine created and used this type of torpedo attack organisation, in the rest navies Captain was the only one who gives commands.