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The National Motor Freight Classification ( NMFC) is a North American voluntary standard that provides a comparison of commodities moving in interstate, intrastate and international commerce via freight shipment. The standard is developed and maintained by the Freight Classification Development Council (FCDC) and published by the National Motor ...
Distance measuring equipment. In aviation, distance measuring equipment ( DME) is a radio navigation technology that measures the slant range (distance) between an aircraft and a ground station by timing the propagation delay of radio signals in the frequency band between 960 and 1215 megahertz (MHz). Line-of-visibility between the aircraft and ...
The automatic identification system ( AIS) is an automatic tracking system that uses transceivers on ships and is used by vessel traffic services (VTS). When satellites are used to receive AIS signatures, the term Satellite-AIS (S-AIS) is used. AIS information supplements marine radar, which continues to be the primary method of collision ...
A hollow square superimposed on this symbol indicates a collocated distance measuring equipment (DME) installation. A non-directional beacon ( NDB) or non-directional radio beacon is a radio beacon which does not include inherent directional information. Radio beacons are radio transmitters at a known location, used as an aviation or marine ...
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Signal speeds. Federal regulators limit the speed of trains with respect to the signaling method used. [ 1] Passenger trains are limited to 59 mph (95 km/h) and freight trains to 49 mph (79 km/h) on track without block signal systems. (See dark territory .) Trains without "an automatic cab signal, automatic train stop or automatic train control ...
The Standard Carrier Alpha Code ( SCAC) is a privately controlled US code used to identify vessel operating common carriers (VOCC). It is typically two to four letters long. The National Motor Freight Traffic Association developed the SCAC code in the 1960s to help road transport companies computerize data and records. [ 1]
List of UN numbers 2001 to 2100. List of UN numbers 2101 to 2200. List of UN numbers 2201 to 2300. List of UN numbers 2301 to 2400. List of UN numbers 2401 to 2500. List of UN numbers 2501 to 2600. List of UN numbers 2601 to 2700. List of UN numbers 2701 to 2800. List of UN numbers 2801 to 2900.