
The periodic rise and fall of the surface of oceans, bays, etc., due principally to the gravitational interactions between the moon, sun, and earth. In an electronic radiolocation lattice, the zone between two lines on which measured values, expressed in terms of the system's electronic unit (wavelength or microsecond), are whole numbers and are one unit apart. Īn established route as an air lane or shipping lane. The place occupied by a point on the surface of the earth, or in space. The coordinates which define such a location. ĭata which define the location of a point with respect to a reference system. The unit of illumination in the cgs system. Ī special-purpose map generally designed for navigation or other purposes. A large-scale map or chart of a small area. Īn orthographic drawing on a horizontal plane, as of an instrument, a horizontal section, or a layout. In united nations law of the sea terminology the seabed and ocean floor and subsoil thereof, beyond the limits of national jurisdiction. The solid matter of the globe in distinction from water and air. For internationally agreed abbreviations of light characteristics see the international chart specifications. A ridge deformation, or undulation of the surface of a liquid. Ī disturbance which moves through or over the surface of the medium with speed dependent upon the properties of the medium. Ī natural or artificial passage or channel through shoals or steep banks, or across a line of banks lying between two channels. Ī long narrow inlet, with depth gradually diminishing inward a creek. The wave activity in the area between the shoreline and the outermost limit of breakers. The hour of the day reckoned by the position of a celestial reference point relative to a reference celestial meridian. In digital cartography, the 0-dimensional geometric primitive of an object that specifies location. The extreme end of a cape or the outer end of any land area protruding into the water, usually less prominent than a cape. Also called compass point when used in reference to compass directions. One thirty-second of a circle, or 11 1/4 degrees.
