Royal Australian Navy Marine Engineers Electrical (L) Rate Patch.

The Marine Engineers' responsibilities include:
1. the operation and maintenance of the main propulsion machinery,
2. the operation and maintenance of the main and emergency generators,
3. provision and maintenance of essential fighting services and
4. the provision and maintenance of domestic services.
The Marine Technical Category in the Australian Navy is a vital component of the nation's defense forces.
It provides specialist technical and engineering services for the navy, including maintenance, operation and support of all types of naval vessels, aircrafts and equipment.
The Marine Technical Category also provides personnel with specialised skills to ensure that operations are conducted safely and efficiently. Additionally, it works closely with other branches of the navy such as logistics, intelligence and communications to provide comprehensive operational support when needed.
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.