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Re: IJN night battle superiority
I am not certain when the PPI scopes were introduced into service with the USN. Before that, the interpretation of data using the "A" and "B" scopes was much more difficult. Range could be determined quite precisely and fall of shot, but identifiying whether a blip was a ship or a rock could really only be done using a separate DR plot, to determine if the object was moving.
Best regards,
Artie Bob(ex-USN CIC officer)
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