Originally Posted by
Uplinker
From Airbus FCOM:
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A long time Airbus FBW TRE told us it was better to climb in managed if you can, and I think it was viewed as good practice. I always use managed climb/descent unless there is a good reason not to, (and just in case there is a constraint that I’ve forgotten).
The only statement I can find for Open Climb:
Nothing about economy, but that’s not to say it doesn’t.
THR CLB/OP CLB uses a managed speed target which is whatever the CI asks for. As far as I know, THR CLB/CLB does exactly the same as OP CLB but uses the fmgc climb altitude constraints. The managed speed target remains the same regardless of whether it is open or managed climb. It will follow speed constraints in the flight plan as long as you’ve got the speed in managed.
The FCTM suggests not using managed climb unless you are flying constraints (
PR-NP-SOP-150: FMS Use).
OP CLB is to be used if ATC gives radar vectors or clears the aircraft to a give FL without any climb constraints.