Sorry for yet another thread on NCO's amd officers but I'm watching Hippocratic Oath at the moment and I was wondering, why does O'Brien answer to the orders of Bashir when as a senior Chief Petty Officer (although only enlisted) he has more years of command and experience than than Bashir, who is only a young Medical Lieutenant, who isn't on the Command track and can only really give orders during Medical situations (forgive me if I'm wrong on this). As the most senior in experince and years of service, and at least closer to the Command track, shouldn't O'Brien be taking charge?