# Commission Implementing Regulation (EU) No 923/2012 of 26 September 2012 laying down the common rules of the air and operational provisions regarding services and procedures in air navigation and amending Implementing Regulation (EU) No 1035/2011 and Regulations (EC) No 1265/2007, (EC) No 1794/2006, (EC) No 730/2006, (EC) No 1033/2006 and (EU) No 255/2010 (Text with EEA relevance), Division SERA.14070: Test procedures

Extent: E+W+S+N.I.

(a) The form of test transmissions shall be as follows:
(1) the identification of the station being called;
(2) the identification of the station calling;
(3) the words ‘ RADIO CHECK ’ ;
(4) the frequency being used.
(b) The reply to a test transmission shall be as follows:
(1) the identification of the station requesting the test;
(2) the identification of the station replying;
(3) information regarding the readability of the station requesting the test transmission.
(c) When the tests are made, the following readability scale shall be used:
Readability Scale
(1) 1 Unreadable
(2) 2 Readable now and then
(3) 3 Readable but with difficulty
(4) 4 Readable
(5) 5 Perfectly readable

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Source: https://www.legislation.gov.uk/eur/2012/923/annex/section/14/division/SERA.14070 (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-923/annex/section-14/division-SERA.14070
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.