Commissioned officers in the Navy are either Line officers or Staff Corps officers. Some have advanced through the enlisted rates and are designated for duty in certain technical fields. These are Limited Duty Officers (LDO) and commisisoned warrant officers (CWO). CWOs and Staff corps LDOs wear their specialty insignia on the sleeve of the dress blue uniforms and on their shoulder boards in place of the star worn by Line officers. On Winter Blue and khaki uniforms, the specialty insignia is a collar device worn on the left collar while the rank device is worn on the right.
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| Boatswain | Engineering Technician |
Repair Technician |
Ordnance Technician |
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| Diving Officer | Aviation Boatswain | Aviation Ordnance Technician |
Aviation Electronics Technician |
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| Air Traffic Control Technician |
Ship's Clerk | Data Processing Technician |
Cryptologic Technician |
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| Aerographer | Security Technician |
Aviation Maintenance Technician |
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