If your flight inadvertently deviates from its current flight plan, the following action shall be taken:
If the aircraft is off track, action shall be taken forthwith to adjust the heading of the aircraft to
regain track as soon as practicable.
If the average true airspeed at cruising level between reporting points varies or is expected to
vary by ±5% of the true airspeed (given in the flight plan), the appropriate air traffic services unit
shall be so informed.
If the time estimate for the next applicable reporting point, flight information region boundary or
destination aerodrome, is found to be in error in excess of 3 minutes from that notified to air traffic
services a revised estimated time shall be notified as soon as possible to the appropriate air
traffic services unit.