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Aircraft D-CURE is doing a test transmission with Hamburg Ground on 121.8. How would ATC inform the pilot that the test transmission is perfectly readable?

  • A

    Hamburg Ground D-CURE read you 5.

  • B

    D-CURE Hamburg Ground on 121.8 read you 5.

  • C

    Hamburg Ground on 121.8 D-CURE read you perfectly.

  • D

    D-CURE Hamburg Ground read you 5.

ICAO Annex 10
Volume II
5.2.1.8 Test procedures

5.2.1.8.1 The form of test transmissions should be as follows:

a) the identification of the station being called;
b) the aircraft identification;
c) the words "RADIO CHECK";

d) the frequency being used.

5.2.1.8.2 The reply to a test transmission should be as follows:

a) the identification of the aircraft;
b) the identification of the aeronautical station replying;

c) information regarding the readability of the aircraft transmission.

5.2.1.8.3 The test transmission and reply thereto should be recorded at the aeronautical station.

5.2.1.8.4 When the tests are made, the following readability scale should be used:

Readability scale
1 Unreadable
2 Readable now and then
3 Readable but with difficulty
4 Readable
5 Perfectly readable

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