Autonomous takeoff required

I see a lot of information about NAV_TAKEOFF but in the Command choices there is only Takeoff. AM I missing something?

We want to do fully autonomous take offs and landings and just not sure what to actually do.

Thanks in advance

NAV_TAKEOFF is a waypoint, it is used as a part of a mission.
Takeoff is flight mode that does takeoff with predefined parameters it is used to do a takeoff outside of an auto mission.

That’s what I’m trying to work out, how to I actually start an auto mission?

Add NAV_TAKEOFF as the first command, then arm and switch to auto.

After you arm and switch to auto you also have to raise the throttle to start the takeoff.
Alternatively set AUTO_OPTIONS bit 1 = 1, so it starts without raising the throttle.
And if you set AUTO_OPTIONS bit 0 = 1 you can even arm in auto mode, so then there’s no need to arm before switching to auto.

[Edit] I didn’t pay attention that this is ArduPlane. Thanks for the correction Andreas.

Nope, that is for Copter.