Question T8C05
From subelement T8 - T8C
What is a grid locator?
Why is this correct?
A grid locator is a letter-number designator assigned to a geographic location on Earth, like 'FM18' for the Washington D.C. area. This system divides the globe into squares for precise location identification. The other options are incorrect: azimuth and elevation describe antenna positioning angles, not geographic locations; neutralizing final amplifiers involves impedance matching equipment; and radio direction finding uses specialized antennas and receivers to locate signal sources.
Memory tip
Grid locators follow a consistent pattern: the first two letters indicate a large region, while additional characters provide increasingly precise location details. Think 'Geographic Grid' - both start with 'G' - to remember this identifies ground locations, not equipment or measurements.
Learn more
Grid locators serve multiple purposes beyond contests, including satellite communication where precise Earth coordinates help track orbital passes, VHF/UHF operations where propagation depends on geographic distance, and emergency communications where location accuracy is critical. The Maidenhead grid system uses a hierarchical approach: two letters for field (like FM), two numbers for square (18), and optionally two more letters for subsquare precision down to about 2.5 miles.
Think about it
Why do you think VHF/UHF operators prefer exchanging grid locators instead of states or countries during contests?