Phraseologies
3.3 The use of metric altitudes and levels in some airspace adjacent to Hong Kong
FIR requires the use of both Standard (feet) and Metric (metres) units within Hong Kong
airspace. To avoid any confusion with level information the following standard
phraseology shall be applied :
a) when referring to an ALTITUDE the unit shall always be specified,
e.g. ‘descend to six thousand feet’ or ‘climb to two thousand seven
hundred metres’;
b) when referring to FLIGHT LEVELS only the METRIC unit shall be
specified, e.g. ‘descend to Flight Level one five zero’ or ‘climb to Flight
Level eight thousand four hundred metres’.