Above mean sea level (AMSL) is the elevation (on the ground) or altitude (in the air) of any object, relative to the average sea level datum. AMSL is used extensively in radio (both in broadcasting and other telecommunications uses) by engineers to determine the coverage area a station will be able to reach. It is also used in aviation, where some heights are recorded and reported with respect to AMSL (contrast with flight level), and in the atmospheric sciences.
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Famous quotes containing the words sea and/or level:
“In the midst of this chopping sea of civilized life, such are the clouds and storms and quicksands and thousand-and-one items to be allowed for, that a man has to live, if he would not founder and go to the bottom and not make his port at all, by dead reckoning, and he must be a great calculator indeed who succeeds.”
—Henry David Thoreau (1817–1862)
“Alle fresh the level pasture lay,
And not a shadowe mote by seene,
Save where full fyve good miles away
The steeple towered from out the greene,”
—Jean Ingelow (1820–1897)