Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/36

Rh 27". The ZUR episode is analysed in paragraph 2.16 p below, and the Board's findings are to be found in paragraph 4.17 p below. From 16:49:41 to 21:43:00 position reports were made to Bangkok, Colombo and the Cocos. The first HF call to Mauritius on 3476 KHz was made at about 21:46:00 when the crew reported the time at the Mauritius FIR boundary as 21:43:00. At about 22:30 a report of crossing longitude 070° East was made. At 23:13:27 a position report of 065° East at FL 350 was made to Mauritius. From 15:41:06 untll 23:14:00 all position reporting was by means of high frequency transmissions. At 23:48:51 the pilot called Mauritius approach control on VHF. The communication which followed has been transcribed from the Plaisance control tower tape recording and is set out below. Free translations of Afrikaans phrases are in brackets. While most of the words were clearly recorded and could be easily transcribed, some of them and some of the unintentional transmissions from SA 295 cannot be made out clearly. In the transcription below the best available interpretation has been given to these passages, based on the conclusions of an expert on eletronic recordings, Dr Jansen, and of an experienced airline captain, Capt R Downes, who listened to the recording repeatedly and became acquainted with the voices of some of the crew.