![]() The MOCA is always at or below the Minimum en route altitude (MEA), and may put an aircraft below air traffic control radar coverage and also below Minimum reception altitude (MRA) for navigation aids as a result, it is typically used only in emergencies, especially to get below icing. The MOCA is based upon obstacle clearance over the terrain or over manmade objects, adequacy of navigation facility performance, and communications requirements. An extra 2,000 feet is added in mountainous areas, 1,000 in non-mountainous. Charting accuracies are taken into account when. These segments are: 443, 453 Feeder routes: A route for aircraft to proceed from the en route structure to the IAF, which includes the course and bearing to be flown, the distance, and the minimum altitude. The MOCA provides the required clearance above obstacles contained inside the obstacle clearance areas. On government charts this altitude is shown with an. This figure is then rounded to the nearest 100 foot increment, i.e. An instrument approach procedure may contain up to five separate segments, which depict course, distance, and minimum altitude. The Minimum Obstruction Clearance Altitude (MOCA) is 3,000 feet. The MOCA seen on the NACO en route chart, may have been computed by adding the required obstacle clearance (ROC) to the controlling obstacle in the primary area or computed by using a TERPS chart if the controlling obstacle is located in the secondary area. MINIMUM OBSTRUCTION CLEARANCE ALTITUDE (MOCA)- The lowest published altitude in effect between radio fixes on VOR airways, off-airway routes, or route segments which meets obstacle clearance requirements for the entire route segment and which assures acceptable navigational signal coverage only within 25 statute (22. Within the United States, this altitude also assures acceptable navigational signal coverage only within 22 nm of a VOR. Minimum Obstruction Clearance Altitude, or MOCA, is the lowest published altitude in effect between fixes on VOR airways or route segments that meets obstacle (like a building or a tower) clearance requirements for the entire route segment.
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