radio operator; radioman
A person who operates radio equipment, especially in maritime, aviation, or military contexts. The term is somewhat dated; modern usage often prefers 通信士 or 無線通信士.
He worked as a radio operator on a ship.
To obtain a radio operator's license, you need to pass the national exam.
A more general term for a communications officer or operator, not limited to radio. 無線技師 specifically refers to a wireless/radio operator.
A modern, formal term for a radio communications officer, often used in official contexts. 無線技師 is an older, more traditional term.
Compound of 無線 (musen, 'wireless') and 技師 (gishi, 'engineer' or 'technician'). The term reflects early 20th-century usage when radio was referred to as 'wireless'.