Yes, as Dan quite rightly said, the QNH is the only technically required field.
On that note, Dan you clearly know your stuff with regard AB. Have you or any other operators here encountered situations where the destination data is
correctly loaded in both the primary and secondary APPR pages, yet the FM generates an ENTER DESTINATION DATA message? I occasionally see that message come up, yet as mentioned everything is correctly loaded. I simply clear the message and continue on our merry way, but I'm at a loss to figure out why it's generating that message when all fields are correctly completed, and it would be nice to know if others encounter it. I don't like randomly generated messages!
