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loran    音标拼音: [l'ɔr,æn]
n. 远距离无线电导航系统

远距离无线电导航系统

Loran \Lor"an\ (l[^o]r"[a^]n or l[=o]r"[a^]n), n. [Acronym, from
LOng RAnge Navigation] (Naut., aviation)
A system of electronic navigation in which a vessel or
aircraft determines its latitude and longitude by measuring
the time differences between low frequency radio
transmissions from two stationary transmitters (slaves) and a
stationary master transmitter. Contrary to the name, Loran is
a medium range system, usually effective for no more than a
few hundred miles from shore. The first commercial system was
called Loran A; the latest (and final) development is Loran
C. [acronym]
[RDH]


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  • LORAN - Wikipedia
    LORAN (Long Range Navigation) [a] was a hyperbolic radio navigation system developed in the United States during World War II It was similar to the UK's Gee system, but operated at lower frequencies in order to provide an improved range up to 1,500 miles (2,400 km) with an accuracy of tens of miles
  • Navigating waters before GPS: Why some mariners still refer to Loran-C
    A quick history lesson on Loran-C: Loran (Lo ng ra nge n avigation) was a hyperbolic radio navigation system developed in World War II Loran grid lines (actually hyperbolas) first appeared on nautical charts during the 1950’s
  • Loran | History, Signals Accuracy | Britannica
    loran, land-based system of radio navigation, first developed at the Massachusetts Institute of Technology during World War II for military ships and aircraft located within 600 miles (about 970 km) of the American coast
  • Why Was LORAN Such a Milestone? | Time and Navigation
    Mechanical clocks and watches that referenced a standardized time became less important to navigation, because electronic systems such as LORAN could accurately calculate a relative position with their own internal time
  • Enhanced Long-Range Navigation (eLORAN) | GPS Lab
    LORAN, short for long-range navigation, was a hyperbolic radio navigation system developed in the United States during World War II It was first used for ship convoys crossing the Atlantic Ocean, and then by long-range patrol aircraft
  • Enhanced Long-Range Navigation (eLORAN) - Department of Transportation
    2 21 24: USDOT Releases: Notification to the U S Coast Guard (USCG) that neither DOT, nor the U S Department of Defense (DoD), are seeking transfer of the Loran properties from the USCG
  • LORAN - alcpress. org
    There were several different systems developed in the U S , Britain, and the Soviet Union The most widely deployed of these systems was LORAN (short for LO ng RA nge N avigation) developed by the United States, indicated by the blue markers on the map below
  • CHAPTER 25 LORAN NAVIGATION - thenauticalalmanac. com
    The Loran-C (hereafter referred to simply as Loran) system consists of transmitting stations, which are placed several hundred miles apart and organized into chains
  • Loran-C - Wikipedia
    One of the reasons for Loran-C's opening to the public was the move from Loran to new forms of navigation, including inertial navigation systems, Transit and OMEGA, meant that the security of Loran was no longer as stringent as it was as a primary form of navigation





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