04-04-2023, 05:48 AM
Hello Ed,
The only reason you need to be less than 30' difference in longitude from your DR is to please the examiner and to get the same answer as he did for Z and Hc.
If you pick the "wrong" AP long. and use the "wrong" long. from that AP the plotted LOP will still be valid and will still pass through your actual position.
But your answers for Z and Hc won't match the examiner's nor pass the exam because they are from a different AP than he used.
I'm sorry that this subject is confusing.... I'm here to help.
Peter
The only reason you need to be less than 30' difference in longitude from your DR is to please the examiner and to get the same answer as he did for Z and Hc.
If you pick the "wrong" AP long. and use the "wrong" long. from that AP the plotted LOP will still be valid and will still pass through your actual position.
But your answers for Z and Hc won't match the examiner's nor pass the exam because they are from a different AP than he used.
I'm sorry that this subject is confusing.... I'm here to help.
Peter