What is the maximum speed allowed on a Slow Route?

The maximum speed allowed on a Slow Route is 250 KIAS. This limitation is in place primarily for safety and efficiency in air traffic management, particularly in areas where the traffic density may be higher or when operating near airports.

The purpose of maintaining a maximum speed of 250 KIAS on a Slow Route is to facilitate separation between aircraft, especially during phases of flight such as departures and arrivals, where slower speeds encourage smoother traffic flow. This speed limit ensures aircraft remain manageable when maneuvering in more congested airspace, thus reducing the risk of wake turbulence and improving overall safety.

It's important to note that there are specific operational guidelines and traffic management considerations that dictate these speed restrictions. In contrast, higher speeds such as 300 KIAS or 350 KIAS would not be compatible with the objectives of a Slow Route and could lead to increased turbulence and more complex air traffic control challenges.