decision height


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Related to decision height: Minimum Descent Altitude

decision height

[di′sizh·ən ‚hīt]
(navigation)
A height specified in MSL (mean sea level) above the highest runway elevation in the touchdown zone at which a missed approach shall be initiated if the required visual reference has not been established; this term is used only in procedure where an electronic glide slope provides a reference for descent or in ILS (instrument landing systems) or PAR (precision approach radar). Abbreviated d.h.
References in periodicals archive ?
As we neared our decision height on the PAR, he stated he was beginning to experience vertigo and called for a control transfer to me in the front seat.
If the runway was not visible by the 200-ft (60 m) decision height, pilots were instructed to fly a missed approach.
And all the while, you must also be counting down the altimeter, either for the published decision height or your personal minimum.
If you were to fly an ILS down to a decision height of 200 feet along a normal 3 degree glide slope, where would the decision bar appear to be?
Obviously, if we're shooting an lLS but the glideslope is out of service, we're no longer worried about the full procedure's decision height (OH); we'll be shooting a localizer-only approach instead.
As we approached the decision height, we obviously weren't going to break out, so we executed our missed-approach instructions and headed to Mobile Downtown Airport.
Currently, Salzburg is certified for approaches to Cat I (60 metre decision height, 550m runway visibility range).
in turn, indicates the missed approach point and is approximately where the approaching aircraft would be at the procedure's decision height when centered on the glideslope and localizer.
Elbit Systems of America expects the Federal Aviation Administration to next year authorize aircraft equipped with its enhanced flight vision system (EFVS) to continue poor weather descents below the current decision height of 100ft (30m).
It's a good thing they were ahead of us to relay when they barely had broken out at decision height.
Since the EVS IR vastly improves the pilot's situational awareness at decision height and allows other airplanes in the air and on active taxiways/runways to stand out clearly in the EVS image, it reduces the potential for accidental collisions," notes Merluzeau.
True, evidence suggests that some "ducking under" decision height, decision altitude or the minimum descent altitude is intentional--the pilot knowingly flies "just a little bit lower" to try to find the runway in the murk.

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