Part 77 Airport Obstacle Evaluation

User:
Password:


Obstacle Name:
Latitude (Degrees or D M S.SS):
Longitude (Degrees or D M S.SS):
Elevation (MSL FT):
Accuracy Code:

Results Format: HTML CSV






Select to try a sample evaluation.

NOTE: This evaluation uses current FAA NFDC airport data.
To evaluate future conditions or special requests or
if you have any questions please contact PY Aviation, LLC at dperry@pyaviation.com.

Inputs

Latitude and longitude can be in degrees or D M SS.SS.
For DMS add spaces between the values, no commas or other characters.
Examples:
43.251484000
-86.051498000
33 38 12.1186
-84 25 40.3104

Once you have run a particular paid location you may rerun that same location with different
settings for elevation or accuracy code without incurring additional cost.
The location latitude and longitude strings must match exactly that of the original paid evaluation.
You can use the Check User Status feature to get a listing of paid evaluations.

If either accuracy code value is set to none then no accuracy code is applied.

The Results CSV option will either download a file named results.csv or
display the data in the browser depending on the operating system and browser.

The Check User Status option will download a file named userstatus.csv or
display the data in the browser depending on the operating system and browser.
It provides the obstacle credit count and a list of evaluations performed.

Results Codes

IN-PEN - the obstacle is in the surface and it penetrates by the amount in the Penet/Clear column
IN-NOT-PEN - the obstacle is in the surface but does not penetrate by the amount in the Penet/Clear column
NOT-IN - the obstacle is not in any surface

The Applied Alt ft column is the elevation applied to the obstacle which is the MSL ft value plus any accuracy code adjustment.

The Eval Alt ft column is the elevation of the surface at the obstacle location.
The obstacle applied elevation value is compared to this value to determine penetration or not.

The Acc Code field indicates ON or OFF and the accuracy code value that is applied when ON.

Part 77 or P77 - FAA
Part 77D or P77D – DOD

PS – Primary Surface – rectangle around runway
CS - Conical Surface for single runway airport
HS - Horizontal Surface for single runway airport
HSA - Horizontal Surface Airport for multiple runway airport
CSA - Conical Surface Airport for multiple runway airport
TSP L1 - Transition Surface Primary surface left part 1
TSP L2 - Transition Surface Approach surface left part 2
TSP R1 - Transition Surface Primary surface right part 1
TSP R2 - Transition Surface Approach surface right part 2
AS AER 1 - Approach Surface Arrival End of Runway part 1
AS AER 2 - Approach Surface Arrival End of Runway part 2
AS TSA L1 - Approach Surface Transition Surface left part1
AS TSA R1 - Approach Surface Transition Surface right part1

HC - Horizontal Circle - circle radius 5000 ft, 0 slope (for airport with no defined runways or no runway end locations - defaults to pseudo RW09)

HA PS - Heliport primary surface (helipad rectangle)
HA CS - Heliport circle - radius 4000 ft slope 8:1
HAD PS - Heliport DOD primary surface (helipad rectangle)
HAD - Heliport DOD circle - radius 4000 ft slope 10:1

Owner codes
PU - public
PR - Private
MA - Air Force
MN - Navy
MR - Army
CG - Coast Guard