Quote:
Originally Posted by commandosolo2009
Just a confirmation: If the tachometer measured surface propulsion, the bendix log measured ...............? Fill in the blanks. No joke, seriously. 
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Maybe you should fill in the blanks for me. The tachometer is no more accurate for measuring ship speed than the pitot tube is for measuring aircraft speed. There were P-47 pilots who claimed they broke the sound barrier in a dive. That's how 'accurate' they are. A shipboard tachometer doesn't have direct contact to the surface medium like a car's does. It can't account for propellor slippage or cavitation.
I'm not saying it didn't happen. What I'm saying is that I have 35 years experience playing tabletop wargames with 'gamers' who want every advantage, and their justification is always the same: "I read it in a book somewhere".