4 ms·
That would be a displaced threshold, marked with arrows rather than chevrons. Can be used for takeoff but not for landing (usually to ensure obstruction clearan
by cjrp 12y ago
That would be a displaced threshold, marked with arrows rather than chevrons. Can be used for takeoff but not for landing (usually to ensure obstruction clearance on the approach).
- sokoloff 12y agoCorrect. In the article's photo of Logan, you can see both on 22L. The chevrons mark an area not usable for either takeoff or landing on 22L. Then, the section marked with a series of 5 long arrows is usable for taking off from 22L, leading to the displaced threshold, beyond which the runway surface is usable for landing (and takeoff, of course). The displaced thresholds on 22L and 22R at Logan are to ensure adequate clearance over boats in the channel north of the field. More info for the curious, from the FAA Airmen's Information Manual: http://www.faa.gov/air_traffic/publications/atpubs/aim/aim0203.html http://www.faa.gov/air_traffic/publications/atpubs/aim/aim02...