Question T2C11
From subelement T2 - T2C
What is meant by “check” in a radiogram header?
Why is this correct?
The 'check' in a radiogram header is the word count of the message text, helping operators verify complete and accurate transmission. This number allows receiving stations to confirm they got the entire message without missing words. Options B and C describe other radiogram elements (originating call sign and relay tracking), while option D incorrectly suggests it's a checkbox rather than a numerical count.
Memory tip
Remember that radiogram components have specific verification purposes: preamble tracks the message, check verifies completeness, and text contains content. The 'check' is always numerical because counting is the most reliable way to detect transmission errors or missing words across radio networks.
Learn more
In formal traffic handling through the National Traffic System, the check serves as a critical error-detection mechanism. When propagation conditions are poor or interference occurs, operators can quickly determine if words were lost during transmission. This verification process becomes essential during emergency communications when message accuracy can affect life safety decisions and resource coordination.
Think about it
Why do you think amateur radio operators chose word counting rather than other verification methods like checksums or repetition for radiogram accuracy?