Show sea level bea ea level in the scientific bengs balls theoretical mean or average fro which aich elevations or depressions 1011 n the earth are calculated the coast nd geo geodetic detle survey which Is govern mant authority on such subjects says mean sea level may inay be defined as the surface which would be assumed by the water of tile the oceans at rest tf if there were no action by the wind 0 or r by the tides due to the attraction of the moon and nd sun gun the sea level surface Is at t all itil points at right angles to a free co winging swinging plummet |