The Coast Guard manned the aircraft with a crew of five, Pilot, Co-Pilot, Flight Mechanic, Navigator, and Load Master, with its role slowly replaced by Coast Guard HC-130 aircraft in the 1960s and 1970s as those newer airframes came on line.
The Coast Guard manned the aircraft with a crew of five: two fficers servig as Pilot and Co-Pilot, augmented by an enlisted Flight Mechanic, enlisted Navigator, and an enlisted Loadmaster. The HC-123B's role in the Coast Guard was slowly replaced by Coast Guard HC-130 aircraft in the 1960s and 1970s as those newer airframes came on line.