The 1 NM per minute of latitude conversion is where I started as that is =
what we used when I was flying.  I see the shadow zone has a range of =
definitions from 102 to 105 as beginning and 140 to 142 as ending =
depending on the reference.  Is there a most accepted range or is it =
somewhat dependent on location?  Is it a sharp cutoff or a gradual =
reduction over a few degrees?








The 1 NM per minute of latitude =
conversion is where=20
I started as that is what we used when I was flying.  I see the =
shadow zone=20
has a range of definitions from 102 to 105 as beginning and 140 to 142 =
as ending=20
depending on the reference.  Is there a most accepted range or is =
it=20
somewhat dependent on location?  Is it a sharp cutoff or a gradual=20
reduction over a few degrees?
 
Randy