What class of airspace is typically found at 18,000 feet MSL?

Prepare for the ASTB Aviation/Nautical Information Test with comprehensive study materials. Boost your knowledge with flashcards and multiple-choice questions, complete with hints and explanations. Ensure your success on exam day!

Class A airspace extends from 18,000 feet Mean Sea Level (MSL) up to Flight Level 600 (60,000 feet) and is generally designed for high-altitude air traffic. It is characterized by a requirement for pilots to operate under Instrument Flight Rules (IFR), meaning that all pilots must have an instrument rating, and the aircraft must be equipped for IFR operations. In Class A airspace, all aircraft are subject to air traffic control (ATC) clearances and instructions, which helps to ensure safety and efficiency in the densely populated airspace above 18,000 feet. This structure supports the high volume of air traffic typically found at those altitudes, primarily involving commercial and cargo flights.

In contrast, Class B, C, and D airspaces operate at different altitudes and serve various traffic control purposes, often lower than Class A and with varying degrees of air traffic control requirements.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy