Sea Level

Sea Level

Mean sea level (MSL) is a measure of the average height of the ocean's surface (such as the halfway point between the mean high tide and the mean low tide); used as a standard in reckoning land elevation. MSL also plays an important role in aviation, where standard sea level pressure is used as the measurement datum of altitude at flight levels.

Read more about Sea Level:  Measurement, Difficulties in Utilization, Sea Level and Dry Land, Recent Changes, Aviation

Famous quotes containing the words sea and/or level:

    I, a spinning man,
    Glory also this star, bird
    Roared, sea born, man torn, blood blest.
    Dylan Thomas (1914–1953)

    Nihilism as a symptom that the losers have no more consolation: that they destroy in order to be destroyed, that without morality they no longer have any reason to “resign themselves”Mthat they put themselves on the level of the opposite principle and for their part also want power in that they compel the mighty to be their hangmen. This is the European form of Buddhism, renunciation, once all existence has lost its “meaning.”
    Friedrich Nietzsche (1844–1900)