Originally Posted by
nitpicker330
Track Deviation for Weather. If a track deviation for weather is required and an ATC clearance cannot be obtained the following procedures shall be followed: 1. if possible deviate away from an organised track system. Broadcast intentions on 121.5 MHz and the air to air frequency 123.45 MHz. All available exterior lights should be selected on and the TCAS monitored for conflicting traffic 2. if the deviation is less than 10 NM, the aircraft should remain at the level allocated by ATC 3. if the deviation is greater than 10 NM, when the aircraft is 10 NM from track, initiate a level change based on the following criteria: Route Centre Line Track Deviations > 10 NM Level Change EAST 000-179 magnetic LEFT RIGHT DESCEND 300 FT CLIMB 300 FT WEST 180-359 magnetic LEFT RIGHT CLIMB 300 FT DESCEND 300 FT
When returning to track, be established at the previously assigned level when the aircraft is within approximately 10 NM of the centre line.
Reporting of Deviation from Cleared Flight Level If a flight deviates by more than 300 FT
Could anyone tell me why the 300 foot change in altitude instead of 500 feet. Is it in case of another aircraft on a contingency procedure?