TRACK DEVIATIONS

Question 1

What is your strategy in case of a rapid descent, emergency descent or diversion within RVSM airspace?

Answer 1

Leave assigned route by turning at least 30 deg right or left and acquire an offset which is mid point between adjacent parallel tracks for all regions except Middle East and Oceanic regions.

The offset in The Middle East is 25 nm
The offset in Oceanic regions are 5 nm
The offset in Russia and Mongolia is 5 nm

If able to maintain level and 5 nm off track center line, then climb or descend 500 ft
If unable to maintain level, minimize descent and select a level that differs by 500 ft

Question 2

What is the procedure for emergency descent/track deviations within Chinese RVSM airspace?

Answer 2

Turn right 30 deg and establish a 5 nm offset, then climb or descend to new level

Question 3

What is the track deviation procedure for weather without an ATC clearance?

Answer 3

Broadcast intentions on 121.5 or 123.45 MHz
Put exterior lights ON

If deviating less than 5 nm, remain at your current level
If deviating more than 5 nm, when 5 nm off track initiate a level change:

Northern turns, descend 300ft
Southern turns, climb 300ft
When returning to track, be at your normal level when 5 nm from track center line