By alrights your captain should recieve a letter every now and then asking for correct/missing details off fire reports...... I know ours does occasionally ( we all forget things at 3am!
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This in its self should be encourageing him to clamp down on it, and if its happening on a regular basis, then state should be onto it as well. After all in the end does it really make your brigade look better?
I agree with the other in respect to thinking they didnt get there. Therefore I have a brigade that gets a few calls but never actually gets any experience.... or worse still they cant get enough crew and arnt even leaving the station!