I'm looking at the KTEB Teterboro NJ Jepp plates for the airport diagram and take off info pages. Runway 01/19 is 7000 feet long with a displaced threshhold at both ends. For landing RW 19, the landing distance for "landing beyond the threshhold" is 6230, less than the total 7000 foot RW length as it is displaced. For landing RW 01, the landing distance for "landing beyond the threshhold" is 5319 feet, again as it is displaced, however the note "last 910 feet unavail for landing distance computations" is added.
1. Anyone know why this 910 feet is "unavail for landing distance computations" if landing RW 01, but not 19? It doesn't appear to be the length of the displaced threshhold for landing 19.
2. I was asked how far is the threshhold displaced for landing RW 01? I used some mental arithemtic gymnastics and came up with 769 feet. Is there an easier way to determine this?
1. Anyone know why this 910 feet is "unavail for landing distance computations" if landing RW 01, but not 19? It doesn't appear to be the length of the displaced threshhold for landing 19.
2. I was asked how far is the threshhold displaced for landing RW 01? I used some mental arithemtic gymnastics and came up with 769 feet. Is there an easier way to determine this?