Corri,gendum No. 1 English only INTERNATIONAL STANDARDS AND RECOMMENDED PRACTICES AIR TRAFFIC SERVICES ANNEX 11 TO THE CONVENTION ON INTERNATIONAL CIVIL AVIATION SEVENTH EDITION - APRIL 1978 CORRIGENDUM No. 1 to English text only 1. Page 22B, paragraph 18.104.22.168, line 4 Insert the phrase "of the most appropriate terminal navigation aids" immediately following the words "the- voice channel s ". 2. Record this Corrigendum on the record sheet, page 2.