We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
Paired bars beside the runway centreline counting distance.
Also known as: TDZ markings, Touchdown bars
Touchdown zone markings are pairs of bars set at fixed intervals from the threshold, and the number of bars in each pair counts down the distance remaining to the aiming point. A pilot reads distance from the count rather than from any figure.
Mark the zone in which an aircraft should touch down, in pairs of rectangular bars set at fixed intervals from the threshold.
Contexts: Public information, Navigation
Encode distance in the number of bars in each pair, which decreases along the runway, so the count gives position without any printed figure.
Contexts: Public information, Navigation
Pairs of long rectangular bars painted either side of the runway centreline, in groups of three, two and one.