Which altitude provides obstacle clearance within 22 nautical miles of the navigational aid?

The Minimum Obstruction Clearance Altitude (MOCA) is the altitude that guarantees obstacle clearance within a specific area, typically within 22 nautical miles of the navigational aid. MOCA provides at least 1,000 feet of clearance over obstacles in non-mountainous terrain and 2,000 feet in mountainous terrain, making it a crucial reference for pilots when flying in proximity to navigational aids.

MOCA is specifically designed to ensure safe navigation by keeping aircraft well above any obstructions that might be present in the vicinity, thus promoting safety during flight. Additionally, this altitude also ensures that the aircraft will have signal reception from the navigational aid while navigating within the specified distance, providing both safety and reliable guidance to the pilot.

In contrast, while the other options pertain to various altitude minimums relevant to navigation, they serve different purposes and do not specifically guarantee obstacle clearance within the 22 nautical mile range from the navigational aid in the same way that MOCA does.