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Total record count: 6269.

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Eng ID Term Definition
4661
semidiurnal tide
See TIDE.
4662
semi-enclosed sea
See ENCLOSED SEA.
4663
semimajor axis
One-half of the longest diameter of an ellipse.
4664
semiminor axis
One-half of the shortest diameter of an ellipse.
4665
send
See SCEND.
4666
sensibility of magnetic compass
The ability of a magnetic compass card to align itself with the MAGNE­TIC MERIDIAN after deflection.
4667
sensibility (or sensitivity) of spirit level
The ACCURACY and PRECISION which a SPIRIT LEVEL is capable of producing. Sensibility depends on the radius of curvature of its longitudinal ... more
The ACCURACY and PRECISION which a SPIRIT LEVEL is capable of producing. Sensibility depends on the radius of curvature of its longitudinal section; the longer the radius, the more sensitive the level.
4668
sensible horizon
See HORIZON.
4669
sensitive bubble
See LEVEL: SPIRIT.
4670
sensitivity of electronic equipment
The ability of electronic equipment to amplify a SIGNAL, measured by the minimum strength of signal INPUT capable of cau­sing a desired val... more
The ability of electronic equipment to amplify a SIGNAL, measured by the minimum strength of signal INPUT capable of cau­sing a desired value of OUTPUT. The lower the INPUT signal for a given OUTPUT, the higher the sensitivity.
4671
sensitivity of spirit level
See SENSIBILITY OF SPIRIT LEVEL.
4672
separation effect
In ECHO SOUNDING instruments with separate transmitting and receiving units, the effect caused by such separation. This introduces an ERROR ... more
In ECHO SOUNDING instruments with separate transmitting and receiving units, the effect caused by such separation. This introduces an ERROR depending on the distance between the acoustic units and varying with the DEPTH of water. Such ERROR makes the registered DEPTH greater than the actual DEPTH. Separation also causes a LAG in registr­ation of the transmitted SIGNAL.
4673
separation line
See SEPARATION ZONE.
4674
separation zone or line
A zone or line separating the traffic LANES in which ships are proceeding in opposite, or nearly opposite directions; or separating a traffi... more
A zone or line separating the traffic LANES in which ships are proceeding in opposite, or nearly opposite directions; or separating a traffic lane from the adjacent sea area; or separa­ting traffic lanes designated for particular classes of ships proceeding in the same direction.
4675
sequence of current
The order of occurrence of the TIDAL CURRENT strengths of a day, with special refe­rence to whether the greater FLOOD immediately prece­de... more
The order of occurrence of the TIDAL CURRENT strengths of a day, with special refe­rence to whether the greater FLOOD immediately prece­des or follows the greater EBB.
4676
sequence of tide
The order in which the TIDES of a day occur, with special reference to whether the HIGHER HIGH WATER immediately precedes or follows the LOW... more
The order in which the TIDES of a day occur, with special reference to whether the HIGHER HIGH WATER immediately precedes or follows the LOWER LOW WATER.
4677
serial temperatures
The OBSERVATIONS required to determine the vertical distribution of temperature and SALINITY with DEPTH at any one place in the OCEAN.
4678
set
The direction toward which a CURRENT flows.
4679
set
(v.i.). Of a CELESTIAL BODY, to cross the APPARENT HORIZON while descending. The opposite is RISE. To establish, as to set a COURSE.
4680
set of observations
A set of two or more OBSERVATIONS at different settings of the apparatus made in order to eliminate certain ERRORS which, for the apparatus ... more
A set of two or more OBSERVATIONS at different settings of the apparatus made in order to eliminate certain ERRORS which, for the apparatus concerned, are inherent in a single OBSERVATION.