AVIONICS FLIGHT CHECKS (CONT)
45 miles at 1,250 feet above station antenna altitude.
TACAN ground-track accuracy test: Fly aircraft over a predetermined ground check point. The
maximum error shall be +3%.
*m. TACAN distance measuring equipment - Check against known distances (on the ground if possible)
using known checkpoints). TACAN should indicate known distances to within+0.5 miles or +5% of
range, whichever is greater.
Transponder set - Check as follows:
Master control - STBY (allow 2 minute warm up).
Master control - NORM.
Code switches - Set test mode.
Code selectors - Set test code.
Fly aircraft within line of sight of interrogating stations.
Contact the facility by radio and request that the aircraft be interrogated and that the reply be
checked for satisfactory response.
Encoding altimeter - Check as follows: