Talk:Line A

Line A in International Radio Regulations

It seems that the disambiguation page for "Line A" assumes that every Line A of any interest anywhere in the world is a part of some rail system. The identical shortcoming is also found in the disambiguation pages for "Line C" While the disambiguation pages for "Line B" and "Line D" do includes some entries other than rail lines, NONE of these disambiguation pages include any references to the Lines A, B, C, and D

The Line A is a line roughly parallel to and approx. 50 miles south of the US-Canadian border. Line A Regulations are meant to protect Canadian Land/Mobile operations near the US/Canadian border from interference. There is a Line B in Canada that mimics the US Line A, as well as a Line C and D between Alaska and Canada and for the same reason. The definition of Line A used in the United States originally came from Paragraph 2 of Arrangement A contained in the revised Technical Annex to the agreement between the United States and Canada on the “Coordination and Use of Radio Frequencies Above 30 Megacycles per Second”, signed at Ottawa on June 16 and 24, 1965.

Line A and Line C are referenced in the US Federal Communications Commission (FCC) Rules & Regulations in at least Part 90 (47CFR90.7), Part 95 (47CFR95.25), and Part 97 (47CFR97.3). Comparable regulations for Line B and Line D exist in the Canadian rules.

Line A. An imaginary line within the U.S., approximately paralleling the U.S.-Canadian border, north of which Commission coordination with the Canadian authorities in the assignment of frequencies is generally required. It begins at Aberdeen, Washington, running by great circle arc to the intersection of 48° N., 120° W., then along parallel 48° N., to the intersection of 95° W., thence by great circle arc through the southernmost point of Duluth, Minnesota, thence by great circle arc to 45° N., 85° W., thence southward along meridian 85° W. to its intersection with parallel 41° N., to its intersection with meridian 82° W., thence by great circle arc through the southernmost point of Bangor, Maine, thence by great circle arc through the southernmost of Searsport, Maine, at which point it terminates.

Line C. An imaginary line in Alaska approximately paralleling the border with Canada, East of which Commission coordination with Canadian authorities in the assignment of frequencies is generally required. It begins at the intersection of 70° N., 144° W., thence by great circle arc to the intersection of 60° N., 143° W., thence by great circle arc so as to include all the Alaskan Panhandle.

I lack both the detailed knowledge to develop the content and the wiki editing skills to create new articles to cover these topics. I would think that Wikipedia ought to have one article covering the four lines, with an entry in each of the four disambiguation pages all going to that one article. N4aof (talk) 16:58, 29 August 2017 (UTC) N4AOF