Airbus oldy now a 737 newby………help!

[Banana Joe]

1. We set airfield elevation on the CL rounded down and MAA is set by the PM during GA; on the NG we set the MDA rounded up and when below 300' below MAA we set MAA altitude.
2. No one in their right mind will take off in known windshear conditions. But if you encounter it, you've got some margins.
3. Customer option.

Different ways to skin a cat.