Part 3, Section 3 - SECONDARY SURVEILLANCE RADAR (SSR) TRANSPONDER OPERATING PROCEDURES

Question 1

Whenever Mode C is operated, pilots shall, in air-ground voice communications where level information is required, give such information by stating their level to the nearest full _____ as indicated on the pilot’s altimeter.

Answer 1

Whenever Mode C is operated, pilots shall, in air-ground voice communications where level information is required, give such information by stating their level to the nearest full 30 m or 100 ft as indicated on the pilot’s altimeter.

Question 2

The pilot of an aircraft in a state of emergency shall set the transponder to Mode A _____ unless ATC has _____ a specified code. In the latter case, the pilot shall continue to use the specified code unless otherwise advised by ATC. However, a pilot may select _____ whenever there is a specific reason to believe that this would be the best course of action.

Answer 2

The pilot of an aircraft in a state of emergency shall set the transponder to Mode A Code 7700 unless ATC has previously directed the pilot to operate the transponder on a specified code. In the latter case, the pilot shall continue to use the specified code unless otherwise advised by ATC. However, a pilot may select Mode A Code 7700 whenever there is a specific reason to believe that this would be the best course of action.

Question 3

The pilot of an aircraft losing two-way communications shall set the transponder to _____

Answer 3

The pilot of an aircraft losing two-way communications shall set the transponder to Mode A Code 7600.

Question 4

If there is unlawful interference with an aircraft in flight, the pilot-in-command shall attempt to set the transponder to ____ in order to indicate the situation. If circumstances so warrant, Code 7700 should be used instead.

Answer 4

If there is unlawful interference with an aircraft in flight, the pilot-in-command shall attempt to set the transponder to Mode A Code 7500 in order to indicate the situation. If circumstances so warrant, Code 7700 should be used instead.

Question 5

If a pilot has selected Mode A Code 7500 and has been requested to confirm this code by ATC (inaccordance with 1.1.5), the pilot shall, according to circumstances, either _____ or _____.

Note.— If the pilot _____, ATC will take this as confirmation that the use of Code 7500 is not aninadvertent false code selection.

Answer 5

If a pilot has selected Mode A Code 7500 and has been requested to confirm this code by ATC (inaccordance with 1.1.5), the pilot shall, according to circumstances, either confirm this or not reply at all.

Note.— If the pilot does not reply, ATC will take this as confirmation that the use of Code 7500 is not aninadvertent false code selection.