Approximately, such a route is a segment of a great circle, such as a line of longitude or the equator.
From the en.wikipedia.org
Each line of longitude carries either two tropical spines or one equatorial and two polar spines, in alternation.
From the en.wikipedia.org
How do you fix a position-line from the heavens onto a line of longitude when that line moves 15 degrees east every hour?
From the newscientist.com
By tradition, it runs roughly through the 180-degree line of longitude, but it zigzags to accommodate the choices of Pacific nations.
From the themercury.com.au
The latest addition is the Klimahaus from 2009, simulating travel adventure along the 8th line of longitude and dealing with climate issues.
From the en.wikipedia.org
Repudiating the date line as an artificial construct, they claim their country, which straddles the 180th line of longitude, will be the first to greet the year 2000.
From the time.com
By tradition, it runs roughly through the 180-degree line of longitude, but it zigzags to accommodate the choices of Pacific nations on how to align their calendars.
From the kentucky.com
The first proposals for the Arizona Territory divided the territory along a line of latitude rather than the later division along a line of longitude that would divide Arizona from New Mexico.
From the en.wikipedia.org
The time of day at the line of zero longitude, which just happens to run right through the Greenwich Observatory in London.