Originally Posted by
aterpster
ATC Watcher:
However, 250 below 10,000 wasn't always a rule. I can only speak to the U.S. When I went with TWA in January, 1964, their was no speed limit below 10,000 except within the old Airport Traffic Area (generally within 5 miles of the airport below 2,000 (or perhaps 3,000) agl).
The TWA/UAL mid-air over New York in December, 1960 finally worked through the regulatory system and sometime in 1964 or perhaps 1965 the rule was changed to 250 below 10,000 and within 30 miles of the destination airport.
Thanks for sharing this historical insight.
That 250 knots below 10,000 within 30 miles lives on in places like Mexico where it's 250 at or below 10,000 AGL within 30 miles of any airport.
Originally Posted by
aterpster
Airbubba:
I don't know about the current EGPWS database, but when I was on a committee working RNP AR issues circa 2004-07, "peaks and obstacles" was a Honeywell option for the EGPWS. "Peaks" provided better point terrain resolutions and "Obstacles" provided tall buildings and antennas. If "peaks and obstacles" is still a database option, then EVA may not have had the Mt. Wilson antenna farm.
BTW, how do I get that Goggle Earth track file? I am not conversant with how to obtain the file.
I also don't claim to know what options and database would be installed on a ROC registered 777 EGPWS but the installations I've recently flown will give a pop-up display of the rising terrain even if terrain is not selected on the nav display. In years past we would go over modes and sub-modes
ad nauseam in training only to find that the ground school stuff had been superseded by a software update.
I've had the OBSTACLE warning in Mexico before when vectored near a hill with an antenna to intercept the approach course in hazy day VMC. We started a terrain avoidance maneuver and the warning quit as soon as the power came up and the nose rose. We were able to positively establish safe terrain clearance in day visual conditions so we broke off the approach and took a turn for another try. My coworker initially suggested continuing the approach but I decided to start again on the long VOR final just to sort things out (CYA these days
).
To view the .kml file on a PC (may also work on an Apple, I'm not sure), first download and install Google Earth using the blue 'Agree and Download' button:
https://www.google.com/earth/download/ge/agree.html
Then, go to this FR24 link and click on the KML button on the right side of the listing for 16 Dec to download the .kml file:
https://www.flightradar24.com/data/flights/br15#be7fcf0
After the file has downloaded, click on 'open' or click on the .kml file in the folder. It should start Google Earth and you can zoom, tilt and turn to view the flight path and the terrain. Also, you can click on each data point to get time, speed, altitude and heading.
Hope this helps.