Guess my outfit is still not enlightened then. We use a mainly silent cockpit approach on our 737s. The recent introduction of the "Speedbrake" and "Reverse" callout on landing was met by an uproar as we only call out something that isn't working as intended, whereas in those two cases we now have to callout if something works.
Apart from that we do not verbally acknowledge any command, for example flaps or gear, or even MCP selections, there is however the finger pointing procedure for altitude selections which warrants only a nod or a "checked". Of course if flying manually the PF will command MCP selection, those do not require a verbal acknowledgement though, simply doing as requested is enough.
All normal checklists that have to be read while the aircraft is in motion (before take off to landing) fit on a sticker on the yoke and are kept as short as possible. There is no lineup checklist at all and the approach checklist contains only one item.
Non normal operation is of course a completely different beast and pretty much everything has to be acknowledged.
Last edited by Denti; 17th November 2013 at 07:29.