Originally Posted by Parkfell
What is important in multi-crew operations is keeping the other pilot in the loop.
Therefore it is necessary to announce what you are about to do.
No. If you're the PF, you do it and then announce from the FMA (if that's your SOP). Speedbrakes do not need to be called; that's what the other pilot has eyeballs for,
if he/she hasn't already noted that some energy destruction is now required.
If you're the PNF/PM, you don't do anything unless told to by the PF eg flaps, gear (or unless covered by SOPs such as switchery after reaching some trigger/flow action point).
Originally Posted by Centaurus
There are times when silence is golden.
Silent dark cockpits = good.