Rainboe,
Would the Fleet Captain and Base Captain both be current 'operational' pilots themselves or is it dependant on the Company? (The answer to my next point is dependant on the answer to this question).
You mention that the Captain is the most senior person on the aircraft - are there ever instances where a Captain would need to refer back to 'The Company' during a flight for guidance (if yes, what if the Fleet Captain and Base Captain were in-flight themselves on other aircraft - who would make a decision?).
Am I looking into this too much and ignoring the fact that as a B747 Captain (for example) these are generally the people with longest service/experience etc. and as such they would be expected to know what to do?
Thanks in advance.