Does torpedo room crew have an effect on torpedo accuracy?

[Sailor Steve]

Gyro And Spread Angle Recievers

82. The gyro and spread angle receivers at the bow tubes are mounted in a gear box with hand or automatic follow-up gear. Following the pointer in the gyro angle receiver operated a mechanical drive to the external angling gear on each tube. Any angle between 0° and 90° R. or L. can be set in 1° steps.

http://www.uboatarchive.net/U-570BritishReport.htm

And here is more information than you ever wanted concerning how the things actually worked.
http://www.maritime.org/fleetsub/tubes/chap7.htm#7A