2000ft (600m) separation when the obstacle elevations is greater than 5000ft (1500m or more).1500ft (450m) separation when the obstacle elevations is between 3000ft (900m) to 5000ft (1500m).The MOCA is the lowest published altitude in effect between fixes on VOR airways, off-airway routes, or route. 1000ft (300m) separation when the obstacle elevations is below 3000ft (900m) Minimum Obstruction Clearance Altitude (MOCA).The MEF below is in hundreds of feet MSL. Sectional chart quadrants are bounded by every 30 minutes of latitude and 30 minutes of longitude. The MOCA will specify minimum vertical separation: In theory, flying at the MEF guarantees you a minimum of 100' of clearance from all-terrain and obstacles in the quadrant. Pilots flying in the USA should know that the MOCA assures also 22NM VOR reception rangeĪt the same time, certain aspects could affect this value, factors like terrain or mountainous areas could change this value according to the following circumstances. The MOCA may put an aircraft below ATC radar coverage (MRVA) and/or below the minimum reception altitude (MRA). The MOCA will specify minimum vertical separation of 1000ft (300m) from the ground or landmarks. << minimum obstacle clearance minimum obstacle clearance altitude minimum operational performance standards > Back to: M.Charts will provide the proper horizontal and vertical separation at those areas where the existence of obstacles could be a factor for the safety of flights. The lowest published altitude in effect between radio fixes on VOR ( very high frequency omnidirection radio range) airways, off - airway routes, or route segments that meets obstacle clearance requirements for the entire route segment and ensures acceptable navigational signal coverage only of a VOR. clearance altitude exceeds the net level. The MOCA is determined and published for each segment of the route. width, for obstacle clearance is where the regulatory bodies differ. Minimum Obstacle Clearance Altitude named MOCA is the minimum altitude for a defined segment that provides the required obstacle clearance.
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