Geodetic computer for amateur radio use. Converts Lat / Lon to Maidenhead Grid Square and reverse Computes range in kilometers and great circle bearing between QTH and remote site specified by Lat/Lon or Maidenhead Grid Square Computes range in kilometers and great circle bearing between QTH and a site selected from a database list for all known callsign prefixes and their geographic position. Geographic position is by major city. WWW: http://www.w1hkj.com/#Geoid - Diane VA3DB db@db.net