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< 1 mph < 1 km/h 0–0.2 m/s: 0 ft 0 m Sea like a mirror Smoke rises vertically 1 Light air 1–3 knots 1–3 mph 1–5 km/h 0.3–1.5 m/s 0–1 ft 0–0.3 m Ripples with appearance of scales are formed, without foam crests Direction shown by smoke drift but not by wind vanes 2 Light breeze 4–6 knots 4–7 mph 6–11 km/h 1.6–3.3 m/s
Posidonius calculated the Earth's circumference by reference to the position of the star Canopus.As explained by Cleomedes, Posidonius observed Canopus on but never above the horizon at Rhodes, while at Alexandria he saw it ascend as far as 7 + 1 ⁄ 2 degrees above the horizon (the meridian arc between the latitude of the two locales is actually 5 degrees 14 minutes).
1.280 km – span of the Golden Gate Bridge (distance between towers) [138] 1.609 km – 1 statute mile; 1.852 km – 1 nautical mile, equal to 1 arcminute of latitude at the surface of the Earth [139] 1.991 km – span of the Akashi Kaikyō Bridge [140] 2.309 km – axial length of the Three Gorges Dam, the largest dam in the world located in ...
It has a nearly round shape with the diameter varying between 11 and 18 km (6.8 and 11.2 mi) and giving an average value of 15 km (9.3 mi). [ 5 ] [ 14 ] The shores are winding and contain many small bays; there are many small sandy islands ( noko ), rocks and coral reefs off the coast with the size up to 600 m (2,000 ft). [ 3 ]
With this value for R the meridian length of 1 degree of latitude on the sphere is 111.2 km (69.1 statute miles) (60.0 nautical miles). The length of one minute of latitude is 1.853 km (1.151 statute miles) (1.00 nautical miles), while the length of 1 second of latitude is 30.8 m or 101 feet (see nautical mile).
However, Avery's fastest 5-day march was 90 nautical miles (170 km), significantly short of the 135 nautical miles (250 km) claimed by Peary. Avery writes on his web site that "The admiration and respect which I hold for Robert Peary, Matthew Henson and the four Inuit men who ventured North in 1909, has grown enormously since we set out from ...
The 40th parallel north is a circle of latitude that is 40 degrees north of the Earth's equatorial plane.It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean.
Alahan Panjang is a village in the kecamatan of Lembah Gumanti, Solok, West Sumatra, Indonesia. The village is located on Kerinci Seblat National Park 's eastern slopes, at an altitude of 1,400–1,600 metres (4,600–5,200 ft), near Mount Talang .