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Old Posted Jan 26, 2017, 3:05 AM
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electricron electricron is offline
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Location: Granbury, Texas
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Quote:
A lot of the land that these great circle routes fly over is very sparsely populated (Northern Canada, Alaska, and Siberia) and there wouldn't really be any issues with sonic booms either.
The law of the land doesn't vary by population density.

Quote:
CFR › Title 14 › Chapter I › Subchapter F › Part 91 › Subpart I › Section 91.817
14 CFR 91.817 - Civil aircraft sonic boom.
§ 91.817 Civil aircraft sonic boom.
(a) No person may operate a civil aircraft in the United States at a true flight Mach number greater than 1 except in compliance with conditions and limitations in an authorization to exceed Mach 1 issued to the operator under appendix B of this part.

(b) In addition, no person may operate a civil aircraft for which the maximum operating limit speed MM0 exceeds a Mach number of 1, to or from an airport in the United States, unless -

(1) Information available to the flight crew includes flight limitations that ensure that flights entering or leaving the United States will not cause a sonic boom to reach the surface within the United States; and

(2) The operator complies with the flight limitations prescribed in paragraph (b)(1) of this section or complies with conditions and limitations in an authorization to exceed Mach 1 issued under appendix B of this part.

(Approved by the Office of Management and Budget under control number 2120-0005)
Source https://www.law.cornell.edu/cfr/text/14/91.817
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