Inaccurate performance data for BOB fighters in COD comparing to RL data

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Present Establishment is what they currently are authorised to have plus they need an additional 200,000 gallons. In the same way the additional guards are an extra establishment. The current guards would be described as the present establishment

If we follow your logic then the RAF in France had no fuel of any description because you are turning all the current fuel (present establishment) into future requirements.