Item 13. Transponder Set AN/APX-72 or Transponder Set AN/APX-44. IFF Transponder

TM 11-1520-209-ESC

RATINGS

PROCEDURE

GREEN

AMBER

RED

Nose: The aircraft must be in flight

Proper replies received by ground

Proper reply not received by ground station

for this test. Establish communication station operator for all operational

operator in one or more operational modes.

with a local ground station equipped

modes

with an IFF radar interrogator

system. Request that the ground

station operator interrogate in each

mode and observe the replies.

Include mode 4 tests if Computer

KIT-IA/TSEC is installed. Include

mode C tests if the altitude

transducer is installed.

Item 14. (Deleted)

b. Rating for Communication Systems. The color rating will be the lowest rating recorded above.