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Total record count: 6269.

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Eng ID Term Definition
5161
submarine sound signal
See SOUND SIGNAL.
5162
submarine spring
See SPRING.
5163
submarine transit lane
A LANE where submarines may NAVIGATE under water or at the surface.
5164
submarine valley
See VALLEY.
5165
submarine volcano
A seabed volcano, submerged at the chart sounding datum, which may or may not be active.
5166
submerged
(adj.). Under water; not showing above water. The opposite is UNCOVERED.
5167
submerged rock
A rock covered at the chart sounding datum and considered to be potentially dangerous to navigation.
5168
subordinate station
See STATION.
5169
subpermanent magnetism
See MAGNETISM: PERMANENT.
5170
subplan
An INSET on a SURVEY SHEET used to extend the survey coverage shown on the sheet, or to show small congested areas at enlarged SCALES.
5171
sub-point
That point on the surface of the EARTH at which a particular CELESTIAL BODY is in the ZENITH at a specified TIME. Also called 'geographical ... more
That point on the surface of the EARTH at which a particular CELESTIAL BODY is in the ZENITH at a specified TIME. Also called 'geographical position of a celestial body'. Calledsub-celestial point in Cana­dian terminology. See SUBLUNAR POINT, SUBSOLAR POINT, SUBSTELLAR POINT.
5172
sub-sea completion
See WELL: PRODUCTION.
5173
subsidiary station
See STATION.
5174
subsoil
All naturally occurring matter lying beneath the sea-bed or deep ocean floor.
5175
subsolar point
The GEOGRA­PHICAL POSITION of the SUN; that point on the EARTH at which the SUN is in the ZENITH at a specified TIME.
5176
subsonic
(adj.). Designating or of SPEEDS that are less than that of SOUND.
5177
substellar point
The GEOGRAPHICAL POSITION of a STAR; that point on the surface of the EARTH at which the STAR is in the ZENITH at a specified TIME. Also cal... more
The GEOGRAPHICAL POSITION of a STAR; that point on the surface of the EARTH at which the STAR is in the ZENITH at a specified TIME. Also called subastral point.
5178
substitute centre
A point which, because of its ease of identifica­tion on overlapping PHOTOGRAPHS, is used instead of the PRINCIPAL POINT as a RADIAL CENTRE.
5179
substitute map
See MAP.
5180
subsurface current
See CURRENT.