Quote:
Originally Posted by razark
The sonar stack also included electronics to make it easier to get the prop count. They must have meant for it to be used somehow.
Do any of the sources mention how accurate the speed obtained was?
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I can try asking my father. He qual'd on a diesel boat in the late 60's and was an ET. I'll see if the the technology was really that different - my guess is it wasn't.
EDIT: He said, yes, it was done in WW2 but if you wanted any confidence in it you had to pop the scope and make sure you knew what the type of ship you were following was. He said a lot of the tracking of Russian vessels in the Cold War that were done was by hydrophone/sonar, and it was purely through prop count.