Quote:
Originally Posted by kach22i
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My guess is,that it's about the 'acoustic' signature of the boat,which an electronics officer aboard an 'enemy' vessel might pick up as an anomaly, when dived.
At zero-yaw of the rudder,the water coming to it would be 'clean',as well as the water coming off it.
A common 'slot' between the two might generate more 'noise.' Potentially 'deadly.'