"Newps" wrote in message
...

There are four maps per station. A short range(0-3 miles) and long range
(0-x). X depends on your terrain. When I worked at GFK the horizon was
at 10 miles so that's as far as the chart went. Here at BIL the farthest
mountains are 100 miles away so thats how far the chart goes out. There
are two charts for daytime and two charts for nighttime


There is no fixed number of visibility maps per station. The number
provided is whatever is deemed necessary and daytime and nighttime
visibility markers can be on the same map.