Question
Which of the following geographic descriptions approximately describes “Line A”?
Answer Options
- A) A line roughly parallel to and south of the border between the US and Canada
- B) A line roughly parallel to and west of the US Atlantic coastline
- C) A line roughly parallel to and north of the border between the US and Mexico
- D) A line roughly parallel to and east of the US Pacific coastline
Correct Answer: A
Explanation
Line A and Line C are imaginary lines on a map used by the FCC to define geographic regions where amateur radio operators face specific frequency restrictions, primarily in shared bands. These restrictions are necessary to protect government or military radio systems near international borders.
Line A is a line roughly parallel to and south of the border between the US and Canada. Specifically, it is a line that runs roughly along the 49th parallel from the Pacific Ocean eastward to the Great Lakes and then generally follows the US-Canada border. Stations located north of this line (closer to the border) often face additional restrictions on specific frequencies to prevent interference with Canadian services.
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