MARITIMES SCANNING SITE
This page is mainly for my own use in calculating bearings and distances between my location and various stations I hear or wish to hear. It helps me figure which way to point the beam, or to see how far away something I have heard is.
Rather than even try to provide any methods, I am simply linking to a few sites you can visit, enter coordinates and get the results.
http://www.nhc.noaa.gov/gccalc.shtml? I like this one as it allows you to use either decimals of degrees or minutes and seconds.
http://www.fcc.gov/mb/audio/bickel/distance.html (this one, from the FCC, also has a search function that allows you to look for broadcast stations by callsign and find out how far away they are)
http://www.dxzone.com/catalog/Operating_Aids/Distance___Bearing/ (this has several ham-oriented related items)