Touchdown zone lights
Touchdown zone lights. Two rows of transverse light bars disposed symmetrically about the runway centerline in the runway touchdown zone.
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touchdown zone - (1) For fixed wing aircraft, the first 3000 feet of runway, beginning at the threshold. (2) For rotary wings and vectored thrust aircraft, the portion of the helicopter landing area or runway used for landing.
TOUCHDOWN ZONE- The first 3,000 feet of the runway beginning at the threshold. The area is used for determination of Touchdown Zone Elevation in the development of straight-in landing minimums for instrument approaches.
Touchdown Zone Lighting (TDZ) - A system of two rows of transverse light bars located symmetrically about the runway centerline, usually at 100-foot intervals and extending 3,000 feet along the runway.
TDZL
touchdown zone lights.
TECHNICAL STANDARD ORDER (TSO)
A performance specification and production compliance criteria applied to avionics and defined by FARs and the RTCA.
Do not use TDZE (Touchdown zone elevation)
Over 90% of missed approach accidents occur on the second missed.
ATC cannot give a visual approach when visibility is less than three miles.
On any runway, long or short, pick a definite touchdown zone and hit it as accurately as you can; don't just land “somewhere” down the runway.
ALS systems are usually used in conjunction with other lighting systems, such as Runway End lights and Touchdown Zone Lights, which mark the ends of the runway and the area in which the plane should touch the runway, respectively.
instrument landing system (ILS) is a ground-based system that guides aircraft to safe landings during periods of low visibility or poor weather. It guides the pilot down an imaginary ramp at a shallow 3-degree angle that leads to the touchdown zone ...
 See also: Runway, Speed, ATC, Aircraft, Landing
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