 NFOs serve as weapon systems officers (WSOs), electronic warfare officers (EWO), electronic countermeasures officers (ECMO), tactical coordinators (TACCO), bombardiers, and navigators.They can serve as aircraft mission commanders, although in accordance with the OPNAVINST 3710 series of instructions, the pilot in command, regardless of rank, is always responsible for the safe piloting of the aircraft.Many NFOs achieve flight/section lead, division lead, package lead, mission lead and mission commander qualification, even when the pilot of the aircraft does not have that designation.