What is a Ground Stop (GS)?

The concept of a Ground Stop (GS) specifically refers to a requirement for aircraft that meet certain criteria to remain on the ground. This typically occurs due to various factors such as severe weather conditions, air traffic control issues, or operational constraints at an airport. When a Ground Stop is implemented, it is essential for the safety and efficiency of air traffic management, as it helps prevent an overload of specific airspace or airport facilities.

In this context, the other options do not accurately describe a Ground Stop. Allowing all aircraft to taxi without restrictions would contradict the purpose of a Ground Stop, as such a procedure is likely to be put in place precisely to prevent movement and manage safety concerns. Similarly, while a Ground Stop can be related to emergency procedures for weather situations, it is not exclusively an emergency protocol; it is a controlled method to manage flight operations in various scenarios. Finally, while a Ground Stop can result in delays for incoming flights, its main focus is not on creating a general delay but rather on ensuring that aircraft that meet the specified criteria remain safely on the ground until conditions improve.