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Eng ID Term Definition
3901
plane surveying
See SURVEYING.
3902
planet
A CELESTIAL BODY of the SOLAR SYSTEM, shining by reflected light and revolving around the SUN.
3903
planet(s): inferior
The PLANETS with ORBITS smaller than that of the EARTH: Mercury and Venus.
3904
planet(s): major
The four largest PLANETS (Jupiter, Saturn, Uranus and Neptune).
3905
planet(s): minor
See ASTEROID.
3906
planet(s): navigational
The four PLANETS commonly used for celestial observations: Venus, Mars, Jupiter, and Saturn.
3907
planet(s): superior
The PLANETS with ORBITS larger than that of the EARTH: Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
3908
plane table
A field device for plotting the lines of a SURVEY directly from the OBSERVATIONS. It consists essentially of a drawing board mounted on a TR... more
A field device for plotting the lines of a SURVEY directly from the OBSERVATIONS. It consists essentially of a drawing board mounted on a TRIPOD, with a ruler on which a TELESCOPE or other sighting device is mounted. See ALIDADE. Also written as one word.
3909
plane table traverse
See TRAVERSE.
3910
planetary
(adj.). Of a PLANET or the PLANETS. Like a PLANET. Terrestrial.
3911
planetoid
See ASTEROID.
3912
planform
The outline or shape of a body of water as determined by the STILL WATER LEVEL.
3913
planimeter
A mechanical integrator for measuring the area of a plane surface.
3914
planimetric map
See MAP.
3915
planimetry
The measurement of plane surfaces. The plan details of a MAP.
3916
planisphere
A MAP or CHART that is the PROJECTION of all or part of a sphere on a plane. A representation, on a plane, of the CELESTIAL SPHERE, especial... more
A MAP or CHART that is the PROJECTION of all or part of a sphere on a plane. A representation, on a plane, of the CELESTIAL SPHERE, especially one on a polar PROJECTION, with means provi­ded for making certain measurements such as ALTITUDE and AZIMUTH. See STAR FINDER.
3917
plankton
The passively drifting or weakly swimming organisms in marine and fresh waters.
3918
plan position indicator (PPI)
A cathode-ray SCOPE on which SIGNALS appear in correct relation to each other, so that the scope face presents a maplike represen­tation of... more
A cathode-ray SCOPE on which SIGNALS appear in correct relation to each other, so that the scope face presents a maplike represen­tation of the area about the transmitter, the direction of a TARGET being represented by the direc­tion of its ECHO from a centre and range by its di­stance from that centre.
3919
planning chart
A chart designed for use in planning voyages or flight operations or investigating areas of marine or aviation activities.
3920
plat
(U.S. terminology). A diagram drawn to SCALE showing land boundaries and subdivisions, and identification of the several units shown thereon... more
(U.S. terminology). A diagram drawn to SCALE showing land boundaries and subdivisions, and identification of the several units shown thereon, and including one or more certificates indicating due approval. A plat differs from a MAP in that it does not necessarily show additional cultural, drainage and relief features. See also MAP: CADASTRAL.