Ebb
Synonym of falling tide.
Ebb current or ebb
Current accompanying the ebb tide.
Ecliptic
The Earth's orbit around the Sun or the Sun's apparent orbit viewed from the Earth.
Ecliptic latitude
Angle between the celestial body and the ecliptic plane.
Ecliptic longitude
Angle between the orthogonal projection on the ecliptic of the direction of the celestial body and the direction of the vernal point.
Ellipsoid
Mathematical surface defining a geodetic system based on the relative positions of points located on the Earth's surface.
Equation of time
Difference between the mean time and the true time. Species: set of components whose frequencies are close to a given number of cycles per lunar day. we distinguish between species with long periods, diurnal and semi-diurnal species.
Equator
Terrestrial great circle contained within the plane perpendicular to the polar axis.
Equinoctial point
Intersection of the ecliptic plane and the equator.
Equinoctial spring tide
Maximum amplitude of the semi-diurnal tide around the equinoxes.
Establishment of the port
Time (true time) of high water on a day on which syzygy occurs at apparent noon.
EuroGOOS
European Global Ocean Observing System.
Exceptional spring tide
Semi-diurnal perigean equinoctial spring tide.
Extended argument number
Doodson number to which a 7th figure has been added, specifying whether the angular argument is associated with a positive or negative sine or cosine.