No, that doesn't make sense. And that makes sense because it is possible. I grab the plastic triangle in the range/bearing setting dial
and pull it down as far as I can.
That sets it for about 1450 yards. Then set speed zero. Point the periscope, push the send range/bearing button and the torpedo will go roughly up that bearing.
I say roughly because there is some parallax error between the periscope and the torpedo tubes, plus the torpedo reach. The smaller the gyro angle, the more precise your bearing will be. This is true of U-Boats and Fleet Boats.
Check out the Sub Skipper's Bag of Tricks thread for further ideas and tutorials.
Welcome to the sunny side of sub simming: the Pacific!