A professional who operates and keeps in repair equipment used in radiotelegraph communications. Responsibilities include:

• Watches frequency lights on receiver to ascertain if station is being called.
• Snaps toggle switch that sets receiver to frequency when call is indicated.
• Opens circuit and manipulates key to acknowledge call.
• Listens to telegraph signal, types message on form, and relays it to addressee by telephone or teletype.
• Manipulates key to call ships or stations by code, and to send messages after acknowledgment.
• Monitors emergency frequency for distress calls, and Conelrad (civil defense circuit) as required by regulations.
• Performs routine repairs and maintenance, such as changing tubes, resistors, and transmitters.
• Is required to have Radiotelegraph License issued by Federal Communications Commission.