It's about 0.00000000002 times as long as The Grand Canyon.
In other words, 0.0000390 shaftments is 0.00000000001330 times the length of The Grand Canyon, and the length of The Grand Canyon is 75,200,000,000 times that amount.(a.k.a. Gran Cañón) (Arizona) (Colorado River miles measure)
The Grand Canyon has a total length of 2,930,000 shaftments along the course of the Colorado River at its bottom. Having opened in early 2007, the Grand Canyon Skywalk allows tourists to stand on a horseshoe-shaped glass walkway 7,220 shaftments above the floor of Granite Gorge.
It's about 0.00000000005 times as long as Hadrian's Wall.
In other words, 0.0000390 shaftments is 0.0000000000500 times the length of Hadrian's Wall, and the length of Hadrian's Wall is 20,000,000,000 times that amount.(a.k.a. Roman Wall, a.k.a. The Wall, a.k.a. Vallo di Adriano, a.k.a. Vallum Aelium, a.k.a. Severus' Wall) (from North Tyneside, Tyne and Wear, England, United Kingdom to Cumbria, North West England, United Kingdom)
Hadrian's Wall, which crossed England form the North Sea to the Irish Sea during the time of Roman rule, measures 790,000 shaftments (about 79 Roman miles). Roman soldiers — at one time up to 10,000 of them — only occupied Great Britain for about 246 years after the wall was built, after which time the local Brits began to take residence the wall's garrisons.
It's about 0.00000000005 times as long as The 405.
In other words, 0.0000390 shaftments is 0.0000000000510010 times the length of The 405, and the length of The 405 is 19,607,000,000 times that amount.(a.k.a. I-405, Interstate 405, San DIego Freeway) (Southern California)
Running from Irvine to San Fernando, The 405 runs a total of 764,700 shaftments. The 405 is the most heavily-trafficed freeway in the United States, with an average speed as low as 8 kph during rush hours.
It's about 0.00000000006 times as long as The English Channel.
In other words, 0.0000390 shaftments is 0.00000000005550 times the length of The English Channel, and the length of The English Channel is 18,000,000,000 times that amount.(average width between Isle of Ushant and The Walde Lighthouse) (La Manche, Ärmelkanal, Mor Breizh, Mor Bretannek) (a.k.a. The Channel)
The English Channel measures between 702,000 shaftments, narrowing as it flows northeast. The world speed record for a Channel crossing by swimmer was set by Australian Trent Grimsey in 2012, with a time of 6 hours, 55 minutes.
It's about 0.00000000007 times as long as The Panama Canal.
In other words, 0.0000390 shaftments is 0.0000000000680 times the length of The Panama Canal, and the length of The Panama Canal is 15,000,000,000 times that amount.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 580,000 shaftments in length. Ships passing through the Canal are raised (and then lowered) 170 shaftments above sea level through the lock-and-dam system.
It's about 0.0000000002 times as tall as Olympus Mons.
In other words, 0.0000390 shaftments is 0.000000000220 times the height of Olympus Mons, and the height of Olympus Mons is 4,500,000,000 times that amount.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 180,000 shaftments. The mountain has been known to astronomers since the nineteenth century because it is tall enough to rise above Mars' frequent dust storms.
It's about 0.0000000006 times as tall as Maxwell Montes.
In other words, 0.0000390 shaftments is 0.000000000540 times the height of Maxwell Montes, and the height of Maxwell Montes is 1,900,000,000 times that amount.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 72,000 shaftments. Since Venus does not seem to have the kind of tectonic activity which gives rise to mountains on Earth, the origin of the Venusian mountain remains the subject of some dispute.