Charting accuracies are taken into account when. The proposed structure is not located within a low altitude airway area and will not. 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 provides the required clearance above obstacles contained inside the obstacle clearance areas. Minimum Obstacle Clearance Altitude (MOCA) - FAR Part 77.17(a)(4). 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. This figure is then rounded to the nearest 100 foot increment, i.e. Its depicted as black letters with an asterisk along an airway. 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 Obstacle Clearance Altitude (MOCA) provides obstacle clearance plus of NAVAID reception. Within the United States, this altitude also assures acceptable navigational signal coverage only within 22 nm of a VOR. Minimum Obstacle 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. JSTOR ( September 2016) ( Learn how and when to remove this template message). Due to recent growth of air traffic demand, inefficiency in flightis becominga more and more important. Unsourced material may be challenged and removed.įind sources: "Minimum obstacle clearance altitude" – news (a) Altitude profile (b) True airspeed profile. Please help improve this article by adding citations to reliable sources.
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