Navy Repair Technician Collar Device SBBA~Double~11383DBR the submarine insignia was to

the submarine insignia was to be worn by officers and men qualified in submarine duty only when attached to submarine units or submarine command organizations

it does not issue the Diving Medical Officer insignia

The CAB was originally planned as a ribbon known as the "Combat Recognition Ribbon

and 220 to 250 for Expert

Navy Repair Technician Collar Device SBBA~Double~11383DBR the submarine insignia was toUnited States Navy Repair Technician Collar Device Criteria: The Repair Technician Collar Device is worn by Navy personnel specializing as Repair Technicians (RT). The following jobs have recently been merged by the Navy into the the larger category of Repair Technician: Damage Controlman (DC), Hull Maintenance Technician (HT), and Machinery Repairman (MR). Damage Controlmen perform the work necessary for damage control, ship stability, fire fighting.