In real life Ray would be made Bravo One on returning from Warrant Officer School. Thirty Mike is a Chief Special Warfare Officer (E-7), as a Chief Warrant Officer (CWO-4) Ray outranks Thirty Mike and every other member of Bravo Team, save for Lt. Commander Blackburn. Thirty Mike being Bravo One means he would be giving orders to someone who outranks him, breaking the chain of command.