Question about GPS/DME during holds

[Squid]

Altitude has no effect on GPS, it does on VOR navigation. When close to the station VOR's display your altitude. If your holding via an intersection then a VOR will read correctly regradless of your altitude (slant range), i.e. turn when the DME read a specific distance, say 15 miles or when the two CDI's center, if your not using DME. It sounds like your confusion GPS and VOR navigation, or more correctly your instructor is.

you're fired!

you mean distance matters if you are using vor/dme (otherwise known as tacan). VORs just give you a relative bearing.

also, you would think that they take into consideration slant range when creating fixes, otherwise us dumb pilots would be smoking holes trying to do the pythagorean theorem all the time.

for example compare tacan (vor/dme) holding with vor holding. the ONLY way you can VOR hold is over the station (same thing with VOR approaches, either the IAF or the FAF is over the station, unless using radar fix/ cross radial). tacan holding, you can hold anywhere you want *except* over the station (cone of confusion anyone??)

 

[saltpeter]

VOR/DME, wash your ears out - That's civilian TACAN.

 

[saltpeter]

You can TACAN and VOR over the station - when the needle first passes 90 degrees relative bearing or the first reversal of the to/from flag is station passage. A TACAN is military for VOR/DME - same animal - same local.

 

[Fly Navy]

VOR/DME, wash your ears out - That's civilian TACAN.

No it's not. VOR is on the VHF band of frequencies and does not natively include a signal for DME. The DME is a seperate transmitter on the UHF frequency band. Your civilian aircraft VOR/DME receiver auto-tunes the paired UHF frequency when you tune the VOR frequency. A TACAN signal is all UHF, in both bearing and distance information. They're different signals. Try tuning a VOR/DME station in your TACAN and see if you get bearing information. Nope. You have to seperately tune the VOR.

 

[saltpeter]

My bad, please forgive me, I haven't been able to think clearly since they gave me that anthrax shot.

 

[Fly Navy]

My bad, please forgive me, I haven't been able to think clearly since they gave me that anthrax shot.

LOL

 

[Super18Ordie]

You too, I got like 7 of them, Im super immune from Anthrax, now if they ever decide to use it here in Southern Maryland

 

[Brett327]

You too, I got like 7 of them, Im super immune from Anthrax, now if they ever decide to use it here in Southern Maryland

Mark datum! This has to be the first time an AO (besides my former self) has chimed in on a GPS holding question!

Brett