landing threshold

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Related to landing threshold: stopway, landing distance

landing threshold

The beginning of that portion of a runway usable for landing. It is indicated by a series of long white lines.

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As the era of GCA ashore concludes and the comforting phrases "approaching glidepath, begin descent" or "over landing threshold, on course" are no longer heard in headsets, the next-generation PALC systems will continue the Navy and Marine Corps ATC tradition of bringing our aircrew back safely.

On glide path, on course past, present and future

The PAPI is always 1000 feet beyond the landing threshold, the glideslope always meets the runway at the PAPI.

This PAPI is less than 1000 feet beyond the landing threshold due to the displacement, but the glideslope still meets the runway at the PAPI.

SEE THE LIGHTS

Consciously check your aiming point, glidepath, airplane configuration, attitude, power setting and airspeed as you near the landing threshold. If any one is not managed so that the airplane will touch at a point where sufficient runway remains to stop, and at a speed where the airplane will not float excessively nor have excess energy that cannot be dissipated in time, then a go-around is not only advisable, it is mandatory.

The long and short of landings: most runway over-and underruns can be cured the same way: pick and use an appropriate aiming point while properly managing airspeed

Turning an emergency into a good beer story often means riding the balance between keeping the long-term goal in view--the landing threshold, in the case of this dead-stick--and the immediate needs.

Think to the future, act in the now

The system consists of steady-burning white lights that start 100 feet beyond the landing threshold and extend to 3000 feet beyond the landing threshold or to the midpoint of the runway, whichever is less.

Find the runway: you just shot the best approach of your life, but you still have to pick out the runway from the visual clutter

Flying on instruments and the moving map only, fly over the landing threshold as shown on the map, start your spiral down with the 30-degree bank, and see how fast you're coming down in the current condition.

If you arrive with altitude to spare, then you should aim to enter a circular pattern either directly over the landing threshold in the landing direction, or directly into the "key position" abeam the numbers.

Emergency descent in IMC: that stabilized descent stuff is fine, so long as you've got time and at least one working engine. Too bad catastrophic failures don't always wait for clear skies

The gate will be established along the final approach course one mile from the final approach fix on the side away from the airport and will be no closer than five miles from the landing threshold."

Spoonfeeding the final: getting a vector to the final approach course is the norm at most airports, not the exception. But there are still a few things you need to know

It's adjusted to be 700 feet wide at the landing threshold. The longer the runway, the more sensitive the localizer will seem from the cockpit.

The quiz

Vertically, GBAS supports offset landing thresholds (landing further down the runway) and variable glideslope angles.

How will LAAS be more? WAAS's more-accurate brother has been slow in coming. Some approaches are available today as well as the equipment to fly them