Final answer:
In a Precision Approach Radar (PAR) procedure, pilots are instructed not to acknowledge further transmissions after the approach clearance is given, to focus on flying the aircraft.
Step-by-step explanation:
During a Precision Approach Radar (PAR) procedure, pilots are typically instructed by the air traffic controller not to acknowledge further transmissions after the approach clearance is given. This is to reduce radio communication as the pilot concentrates on flying the aircraft based on the precise guidance provided by the controller. The controller will continue to provide altitude and heading instructions without expecting a verbal response, expecting the pilot to comply with instructions to ensure the aircraft remains on the correct approach path.