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The international nautical mile is defined as exactly 1,852 metres. This definition was adopted in 1929 by the International Extraordinary Hydrographic Conference, Monaco. The United States adopted it in 1954. Prior to the adoption of the international nautical mile, the nautical mile used by the US and the UK was 6080 feet, or 1853.184 metres.
The nautical mile is a minute of arc along a great circle of the Earth at the equator. In practice the nautical mile is measured on a meridian as change of latitude on a map, as the nautical mile is only a minute of arc on the equator.
The abbreviation "nm" is used. The same abbreviation, "nm", is also used to denote nanometre in the SI though little confusion is generated from this, as the contexts of use are very different. For example, the 'nm' abbreviation is typically seen in listings of aircraft flight range, but listed next to the range in kilometers (km). ( http://www.airliners.net/info/stats.main?id=400 Example of nm, km together- in performance section). Also, the large ratio of 1.852 trillion makes confusion unlikely in most cases. The abbreviation nmi is also used.
One knot is a unit of speedFor alternate uses, see Speed (disambiguation). Speed (symbol: v is the rate of motion, or equivalently the rate of change of position, expressed as distance d moved per unit of time t''. Speed is a scalar quantity with dimensions Length/ Time; the equiva defined as one nautical mile per hourIn modern usage, an hour is defined as a unit of time 60 minutes, or 3600 seconds in length. It is approximately 1/24 of a median Earth day. There is also the hour of right ascension a unit of both time and angle. Earlier definitions of the hour: One twel. It is therefore 1852 metres per hour exactly.
See also: conversion of unitsThis article lists conversion factors between a number of units of measurement. Key: definition exactly equal to approximatively equal to Length Area Volume Angle Mass In physics, the pound of mass is sometimes written lbm to distinguish it from the pound, orders of magnitude (length)See also SI, SI prefixes, and SI base units units length orders of magnitude orders of magnitude (area) orders of magnitude (volume) orders of magnitude (mass) orders of magnitude (time) Planck units size comparisons External links Orders of magnitude (le.
NMI is also the name of a joint venture responsible for the construction of the Dublin Port TunnelThe Dublin Port Tunnel Tollan Calafoirt Bhaile Atha Cliath in Irish) is a landlocked road traffic tunnel in Dublin, Ireland (still under construction as of 2004). Leading from East Point/ East Wall, Dublin 3 to Santry, Dublin 9, the tunnel connects the Du.
NMI also stands for Non-Maskable Interrupt, a type of interruptIn computer engineering, an interrupt is a signal from a device which typically results in a context switch: that is, the processor sets aside what it's doing and does something else. Digital computers usually provide a way to start software routines in r on several types of computers, such as the IBM PCThe IBM PC (Personal Computer), is a trade mark of IBM. The predecessor of the current personal computers, it was introduced in August 1981. The original model was designated the IBM 5150 . It was helped created by Don Estridge who changed the world of IB and Apple II, that causes the CPU to stop what it was doing, change the program counter to point to a particular address, and continue executing code from that location. Programmers are unable to program the CPU to ignore these interrupts, hence the term "non-maskable".
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