309 - TELEPHONE SWITCHBOARD OPERATOR
[TP OPER]

Operates a common battery telephone switchboard in a permanent installation to relay outgoing and incoming calls to or from branch telephones; or operates a common battery telephone switchboard at the toll position of an automatic telephone system.

508 - CRYPTOGRAPHIC EQUIPMENT REPAIRMAN
[CRYPTO RPRMAN]

Inspects, adjusts, repairs, and maintains special classified electrical cryptographic equipment (ECM).

510 - PLOTTER, AIR WARNING  
[PLOTTER, AW]

Places markers on a filter board, operations board, or map to indicate the presence, type, direction, and altitude of friendly or enemy aircraft approaching or present in a specified area.

514 - RADAR OPERATOR (Designated Equipment)  
[RADAR OPER (***)]

Performs various duties as a member of a team which sets up and operates a particular type of radar set.

515 - FILTERER, AIR WARNING
[FILTERER, AW]

Analyzes, evaluates, and interprets information regarding enemy or friendly flights which has been plotted on filter board, operations board, or map.

530 - DRAFTSMAN, SIGNAL  
[DRAFTSMAN, SIG]

Prepares circuit diagrams, drawings, and sketches for the wiring of communication systems and electrical equipment; compiles data from aerial, topographic, or other maps to plot wire alinements, and to make maps, line route maps, and overlays.

542 - COMMUNICATION CHIEF  
[COM CHF]

Supervises a communication section or larger unit in the installation, operation, maintenance, and repair of equipment used in wire, radio, message center, and air-ground contact communication facilities.

641 - TELEPHONE MAN
[TP MAN]

Performs one or more duties incident to the installation, operation, or maintenance of a wire communication system, such as laying, maintaining, and taking up wire or cable, and installing, maintaining, and operating a portable magneto type of common battery switchboarod.