Why did some countries adopt the metric system while others retained imperial units?

Short Haul Provision - 150 Air-Mile Radius Driver (49 CFR Section 395.1(e)). Drivers who operate within a 150 air-mile radius (172.6 statute miles) of their. Statute Mile ... 1A nautical (or geographical) mile is a unit of distance based on the length of a minute of arc of a great circle of the earth, defined to be ... Mar 2, 2021 ... Can the lights comply with the 3-statute mile visibility requirement of the FAA? How well do the lights perform when mounted at both the ... Feb 21, 2025 ... Knots, on the other hand, are used to measure speed. One knot equals one nautical mile per hour, or roughly 1.15 statute mph. In these tables where foot or mile is underlined, it is survey foot or U.S. statute mile rather than international foot or mile that is meant. Units of Length. Oct 17, 2016 ... Also, in Class G airspace, when the visibility is less than 3 statute miles but not less than 1 statute mile during night hours, an airplane may ... Aug 1, 2020 ... On land we measure long distances in miles. These are referred to as statute miles (sm). In navigation, distance is measured in. Offshore discharges are discharges that occur more than 3 statute miles seaward of the coastline. 2. The location of the discharge with respect to special ... Accordingly, 100 air miles are equivalent to 115.08 statute miles or 185.2 kilometers. "Commercial motor vehicle" means any self propelled or towed vehicle used ... A mile is a unit of length. There are many different kinds of mile but mile on its own usually means the statute mile.