Why turn the TCAS to standby on the ground?

[Checks]

Why turn the TCAS to standby on the ground?

 

[Max Q]

Because you touch yourself at night?

How dare you attempt a worthwhile discussion on FI.com.

 

[mynameisjim]

In my airplane it automagically changes your display range when it gets a traffic alert, and it's not smart enough to realize you're on the ground. There's one reason.

 

[rjacobs]

You're generally not turning the TCAS to standby, you are turning the transponder to standby. Most planes I have been in the transponder controls and the TCAS controls are one and the same.

 

[CX880]

Why turn the TCAS to standby on the ground?

so that it's ready. some times you alos turn it on at bigger airports so that they can track your movement around the taxiways. just don't put in on alt so that a southwest airplane doesn't have to do a go around on short final.

 

[rightrudder]

Most airports do not want it in the on position on the ground because it clutters their screen with a target that is not airborne.

 

[wmuflyguy]

Most airports do not want it in the on position on the ground because it clutters their screen with a target that is not airborne.

Unless they have ASDE-X...which most large airports are getting. ATL, JFK, DFW...etc.

And just so we are clear, they want the Transponder on...not the TCAS. Though in the CRJ the transponder turns the TCAS on (and RA/TA are inhibited ont eh ground). ATC doesn't "see" TCAS.

 

[papanovember]

American and Alaska keep their TCAS on TA/RA from brake release to parking brake set, one less thing to do on the taxi/before takeoff checklist.

so that it's ready. some times you alos turn it on at bigger airports so that they can track your movement around the taxiways. just don't put in on alt so that a southwest airplane doesn't have to do a go around on short final.

Those airports that have ASDE-X require the transponder with mode C to be on so that would mean putting the transponder on "ALT". If it is just on "ON" that airplane will get a TA because there is no altitude information being given to the other transponders. I don't know how you get to the airline level without knowing that. That is student pilot 101 information.

 

[stall022]

It doesn't matter...TCAS systems use an algorithm to define closer rates of aircraft and then communicate with each other as well as inhibit TA/RA’s at certain altitudes. Since the aircraft on the ground does not have a closer rate over a pre-determined value you will not receive an RA no matter the position of the switch in the cockpit of the aircraft on the ground.

all sorts of useless TCAS knowledge can be found here: http://www.arinc.com/downloads/tcas/tcas.pdf

And Mesa sucks

 

[GravityHater]

How do they declutter the scope at asdex airports? (ie the airspace above)