Airbus 320 about <UTC CSTR>

[hangil94]

Thank you for your last replies .... I really am...

Today, I got another question... hmm... -_-;

In MCDU vertical revision pages, we can see "UTC CSTR",
section except FROM waypoint .
and the FCOM says
- At origin it enables the pilot to enter an estimated takeoff time.
- At any waypoint it enables to enter one time constraint (Only
one for the entire flight plan

I read these sentences more than five times..
But I could not understand....

"When" and "Why" could we use this function ???




Always Safe and Happy FLT !

[catchup]

- At any waypoint it enables to enter one time constraint (Only

Sometimes ATC wants you to cross xyz at a specific time. Just enter and your cruising speed will be adjusted (between green dot and MAX)

regards

(corrected for spelling error)

[Hand Solo]

If you have an ATC slot delay you can insert a planned take off time to get estimates in GMT for waypoints on route. Not sure why you'd need that but we used it as a rough guide as to whether we'd make schedule.

[kaepa]

quote
- At origin it enables the pilot to enter an estimated takeoff time.

planit can be used when ATC sometimes holds your takeoff requiering an waypoint Xing time constarint , like FIR boundry limit or so,you can know your airborne time for such constarint






- At any waypoint it enables to enter one time constraint (Only
one for the entire flight

i agree with catch up

[Sheep Guts]

Thats interesting could this be used in the hold for example when given an expected approach time by ATC?

Sheep