Be aware that there is also 6-character version, which provides a more precise location. The most commonly used version of grid locator is the 4-character version (e.g., DM79), which is used for the major VHF contests and awards. (Actually, since the earth’s surface is curved, they are more complicated three dimensional shapes.) Anyway, I try not to say grid square, but it often sneaks in. These things are commonly called grid squares even though they are really rectangles or perhaps trapezoids. Greater Colorado Springs is to the south in grid DM78. For example, the home location of KØNR is located in grid DM79, which includes greater Denver. A grid is indicated by two letters (the field) and two numbers (the square). Amateur radio operators on the VHF bands often use the Maidenhead Locator System for indicating their location, often referred to as a “grid locator.” A grid is defined by 1° latitude by 2° longitude, measuring approximately 70 × 100 miles in the continental US.
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