Hello ronshire2000

 

 

In answer to your question I personally use Google Maps Distance Calculator for my Transatlantic catches and  for my domestics this site http://www.topazdesigns.com/ambc/ it has very useful information about power output  and antenna patterns also just with the input of your geographical coordinates and the  callsign you are searching for

 

 

73

Allen Willie

St. John's, Newfoundland