This is just a simple page to calculate distance and bearing between two IARU locators. Simply type them into the two locator fields, and click on the calculate button.
IARU locators were designed by radio amateurs as a simple, brief way of pinpointing their stations. A six-character locator refers to a unique area of 2.5 minutes of latitude and 5 minutes of longitude. The locator consists of two letters, two numbers, and another two letters, for example JN23RG. Eight and ten character locators may also be used, e.g. JN23RG39 and JN23RG39AW. These seldom used locators represent more precisely defined locations.
The Great Circle results are normally of interest to radio amateurs, the Rhumb Line is of interest to navigators.