the auxiliary division on a ship or submarine
The A-gang did not respond well to the change in procedure.
by The Return of Light Joker January 13, 2012
Naval term for the auxiliaries division of the engineering department. These personnel operate and maintain the ship's auxiliary equipment (air conditioning systems, distilling units, air compressors, etc.)
That guys been an "A-ganger" ever since he enlisted.
by Atomic Johnny March 30, 2005