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For any structures exceeding an Obstruction Standard, the FAA may initially issue NPHs. A MOCA is an Obstruction Standard of FAR Part 77, §77.17(a)(4). For example, 42 means 4200 feet.īy definition, AMA is only applicable to IMC. However, V10 has a Minimum Obstacle Clearance Altitude (MOCA) with an OCS of 2,449 feet AMSL, which is below the Target Height. Within the FAVA, a reduced clearance of 150m (492ft) above the dominant obstacle shall be applied and this figure will be rounded up to the nearest hundred feet. The larger one represents the thousands of feet and the smaller one is for the hundreds. The AMA is maked on charts using two digits, usually one larger and one smaller. MOCA will give you 1000 ft separation from terrain when terrain is less than 5001 ft and 2000 ft separation when terrain is more than 5000 ft. between 35 and 36 North and 27 and 28 East). MOCA (Minimum Obstacle Clearance Altitude) MOCA will give you a minimum altitude above terrain and guarantee VOR reception within 22 nm from the beacon. the area between lattitude X and X+1 and longitude Y and Y+1 (e.g. While the ICAO definition allows for different sizes and shapes of the area, the most common format used is a 1-degree quadrilateral, i.e. Normally this means 2000 ft over high terrain or in mountainous areas and 1000 ft otherwise but different figures can be specified by the competent authority.

The MSA’s intent is to give the pilot a minimum altitude for emergenciese.g. 1 DescriptionĪrea minimum altitude (AMA), sometimes referred to as minimum off-route altitude (MORA) provides minimum obstacle clearance above all obstacles in the area. The MSA is the minimum obstacle clearance altitude surrounding identified fixes (and not always the airport or the final approach fix, so watch out) and is further defined by radials or bearings and distances from that fix. The minimum altitude to be used under instrument meteorological conditions (IMC), that provides a minimum obstacle clearance within a specified area, normally formed by parallels and meridians.