Originally Posted by
III Corps
In many cases, the (not so) brief on the gate includes the departure and any special considerations (runway conditions, wx, reduced thrust). Essentially as much as you can get out of the way before moving the airplane including V speeds if possible. Also, the rejected takeoff. So you can see why the not-so-pretakeoff brief can and probably should be done at the gate.
At the end of the runway, you are left with maybe a rebrief of the numbers if wt/bal has been revised, anything diff from the gate brief, first fix and first altitude.
Each carrier, whether Part 121 or 135, probably has a slightly different variation of the briefings. The Departure Review can and probably should be done at the gate with a Take-off Briefing, as III Corps said, done just prior to taking the runway.
The Take-off Briefing reviews any changes to the Departure Review, verifies runway, flap setting, thrust setting, T/O weights and V speeds. Also, it's important to review the ENG OUT procedures so that it's fresh in everyone's mind. I would also include the initial portion of the departure procedure with any restrictions; "O'Hare Six Departure, left turn to 270, up to 5,000 with a 3X5 and 4X8 restriction".
G'Day and fly safe and have fun !!