In the US Navy, a Fire Control Man was responsible for the maintanence and operation of the equipment that 'aimed the guns or the torpedos as the case might be. I was an FT[M] 2 this being a Fire Control Techhnician, Missiles. The rating was changed from FC to FT sometime after WWII and was then further divided into 3 categories, these being FT[G] (Guns) FT[M] (Missiles) and finally, FT[U] (Underwater) I'm not really sure about today but I believe the FC rating has been restored - not really sure about the classifications within the rating.
IF possible, tell your father I would die a happy man if I could just one time run the systems to lay one broadside with those 16" guns. Did you know that the FC 'computer' for those guns actually calulated and corrected for the pull of the moon's gravitational pull while the projectile was in flight?
I checked with my nephew and the present day US Navy has both the FC and the FT. The FC rate is concerned with the electronics - computers, etc. - while the FT works on the mechanical devices - directors, etc. As an FT in the 60's we worked on all of it but did not have so much in the way of electronics as now.
The Fire Controlman [FC] rating badge.
The Fire Control Technican [FT] rating badge.