CAP 413 Radiotelephony Manual
Chapter 3 Page 1
Chapter 3
1.2.3 However, care must be taken to ensure that misunderstandings are not generated as
a consequence of the phraseology employed during these phases of flight. For
example, levels may be reported as altitude, height or flight levels according to the
phase of flight and the altimeter setting. Therefore, when passing level messages,
the following conventions apply:
a) The word 'to' is to be omitted from messages relating to FLIGHT LEVELS.
b) All messages relating to an aircraft’s climb or descent to a HEIGHT or ALTITUDE employ the word 'to' followed immediately by the word HEIGHT or ALTITUDE.
Furthermore, the initial message in any such RTF exchange will also include the
appropriate QFE or QNH.