A professional who controls equipment to intercept, locate, identify, and record radio transmissions of enemy or potential enemy. Responsibilities include:

• Tunes receiver over assigned frequency band.
• Obtains bearings on source of transmission, using electronic direction-finding equipment.
• Informs location plotters of bearings obtained to locate and identify station.
• Monitors stations, records intercepted transmissions, and forwards transcripts for decoding.
• May operate sound-recording equipment to preserve broadcast for analysis by other intelligence personnel.