I have never seen such chart. The only way I use is the compartment efficiency meter (that green bar above) and using correct qualified officers + enough crew there. When meter is full (maximum efficiency), that is all I need to know.
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Kapitänleutnant Vlad von Carstein - U-Flotilla Saltzwedel - U-123, Type IXB
SH3 GWX 3.0
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