How closely should Radar Assigned Airspeed be maintained?

Radar Assigned Airspeed should be maintained within a tolerance of +/- 10 knots. This accuracy is crucial for maintaining safe separation from other aircraft and ensuring compliance with air traffic control instructions.

When flying under instrument conditions, pilots are expected to adhere closely to the speed assigned by the radar controller to enhance overall air traffic management and safety. Maintaining airspeed within this specified range helps in predictable flight behavior and reduces the chances of conflicts with other aircraft.

Adhering to a tighter tolerance ensures that pilots can better manage their aircraft’s performance, considering factors like wind conditions, air density, and the specific operational procedures of the aircraft. Straying beyond this limit could lead to deviations from cleared flight paths, overcrowding in congested airspace, or potential safety risks during approach and departure phases.