What information must be communicated when entering a hold?

When entering a hold, it is crucial to communicate both the time you are entering the hold and your altitude at that moment. This information is essential for air traffic control and for maintaining a clear understanding of your position relative to other aircraft.

The time provides a reference for how long the aircraft has been in the hold and helps controllers manage the flow of traffic, as well as ensure that the aircraft remains safely separated. The altitude is equally important because it confirms that the aircraft is at the correct elevation for the holding pattern and adds to the situational awareness both for the pilot and air traffic control.

In summary, communicating both the time and altitude when entering a hold ensures proper coordination and safety, making it the necessary standard for effective communication in air traffic operations.