"Captaincy" is a term that was thrown around a lot in the RNZAF. Sort of what the USN/USMC/USCG calls "Airmenship".
On another note, RNZAF P-3 crews can have a Navigator/Captain (not the norm, but an exception). He/she signs for the airplane. I know we had "Mission Commanders" in the USN, but no kidding the Kiwis considered the nav/capt as an ultimate authority of safety of flight.