Royal Australian Navy Gunnery Fire Control (FC) Rate Patch.

Gunnery is a Seaman sub-branch of the Operations Branch.
Gunnery in the Navy includes all weapons designed to strike the enemy in the air, on the ground and on the surface.
The responsibility of the Missile Category includes:
1. Guided Weapons,
2. Guns and
3. Training in aid to the civil power and ceremonial.
A fire control officer ranges the salvos transmitted elevations and angles to individual guns.
The gun layers adjusted the elevation of their guns to match an indicator which was the elevation transmitted from the Fire Control Table—a turret layer did the same for bearing. When the guns were on target they were centrally fired.
After centuries of loyal service, in the early 1990's, the Royal Australian Navy disbanded the Gunnery Branch and divided their duties and responsibilities between the newly formed Boatswain's Mate Branch, the Electrical Branch and the Coxswain's Branch.
Specialization badges are issued for the achievement of specialist qualifications or acquisition of skills.
Rate badges are worn on the right arm to identify specific specializations.
All ‘square rig’ and ‘fore-and-aft’ working rigs had red rank and rate badges until 1990. RAN winter uniforms have since had only gold badges, while summer uniforms or ‘whites’ continue to have dark blue.
The Royal Australian Navy (RAN) and the British Royal Navy (RN) basically used the same insignia until 1966, when ‘Australia’ flashes were added to both shoulders.