Airbus 320 about <UTC CSTR>
 

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 !

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)

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.

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

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

Sheep