What is the speed limit below 10,000 feet MSL?

The speed limit below 10,000 feet MSL (Mean Sea Level) is 250 knots. This regulation is in place to ensure safety and reduce the noise impact on populated areas during the critical phases of flight. At lower altitudes, aircraft are generally closer to the ground, which can complicate their handling due to terrain and obstacles, and the potential for increased interactions with general aviation traffic. Implementing a speed limit of 250 knots helps pilots maintain a safer operating margin, allowing for better control and responsiveness while communicating with air traffic control, especially in busy terminal airspace. This standard is widely recognized in aviation regulations and is crucial for maintaining order and safety in the skies.