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A concept related to the missed approach point is the visual descent point (VDP).Determination of its location is done by the designers of the instrument approach procedure, but typically this is a point on the final approach course of a non-precision approach, from which the aircraft would be able to continue its descent from the MDA to the runway threshold while maintaining a standard 3 ...
English: non-precision Instrument approach: MDA = minimum descent altitude; MDH = minimum descent height; MAPt = missed approach point; green line: runway in sight → continue descent below MDA/H; red line: runway not in sight before reaching MAPt → hold altitude; when reaching MAPt → missed approach/go around
English: Instrument approach chart for ILS RWY 17 of Tacoma Narrows Airport. Rules for a missed approach are highlighted in red. This chart from january 2012 is possibly outdated – DO NOT USE FOR NAVIGATION.
Generally, if a pilot determines by the time the aircraft is at the decision height (for a precision approach) or missed approach point (for a non-precision approach), that the runway or its environment is not in sight, [a] or that a safe landing cannot be accomplished for any reason, the landing approach must be discontinued and the missed ...
The missed approach track is shown as a thin hash marked line with a directional arrow. Missed approach icons are in the upper left or right of the profile view. [1]: 16–25 Landing minimum are listed for either a straight-in landing, or a circling-to-land, for each aircraft approach category.
An onboard navigation system displays a constant rate descent path to minimums. The VNAV path is computed using aircraft performance, approach constraints, weather data, and aircraft weight. The approach path is computed from the top of descent point to the end of descent waypoint, which is typically the runway or missed approach point. [1]
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It is typically located about 1 NM (1.85 km) inside the point where the glideslope intercepts the intermediate altitude and transmits a 400 Hz tone signal on a low-powered (3 watts), 75 MHz carrier signal. Its antenna is highly directional, and is pointed straight up. The valid signal area is a 2,400 ft (730 m) × 4,200 ft (1,280 m) ellipse (as ...