What is the maximum descent authorized for a Category A aircraft when approaching?

The maximum descent authorized for a Category A aircraft when approaching is 1,000 feet. This is established primarily to ensure safety during the final approach phase, where the aircraft is often operating at lower altitudes and speeds. The criteria for categorizing aircraft into A, B, C, and D classes are based on their approach speeds, with Category A being the slowest. This slower profile allows for a steeper approach angle and helps in minimizing the risks associated with close proximity to the ground, ensuring that pilots have enough altitude to execute go-arounds if necessary, along with providing the time needed to react to any potential issues.

There are specific altitudes and descent rates tailored to each category to optimize their operational efficiency and safety. For Category A aircraft, a maximum descent of 1,000 feet is designed as a compromise between operational safety and efficiency, allowing for adequate reaction time while still enabling a controlled approach.