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Eng ID Term Definition
4761
signal
As applied to electronics, any transmitted electrical IMPULSE. That which conveys intel­ligence in any form of commu­nication, such as a TIM... more
As applied to electronics, any transmitted electrical IMPULSE. That which conveys intel­ligence in any form of commu­nication, such as a TIME SIGNAL, a PIP on the SCOPE of electronic equipment, or an object marking the locati­on of a surveying STATION.
4762
signal: eccentric
See ECCENTRIC SIGNAL.
4763
signal: fog
See FOG SIGNAL.
4764
signal: hydrographic
Any object, existing or specially erected, for the CONTROL of HYDROGRAPHIC SURVEY. See also SOUNDING MARK.
4765
signal: longitude
A sign indicating a time event, observable at different stations, and used in compa­ring LOCAL TIMES of those stations, and determin­ing the... more
A sign indicating a time event, observable at different stations, and used in compa­ring LOCAL TIMES of those stations, and determin­ing the difference of their LONGITUDES.
4766
signal: luminous
In SURVEY­ING, a SIGNAL consisting of HELIOTROPE or HELIOSTAT by day, and SELENOTROPE or SIGNAL LAMP by night.
4767
signal: sound
See SOUND SIGNAL.
4768
signal: survey
A natural or artificial object or struc­ture whose horizontal and sometimes vertical POSITION is obtained by surveying methods. Survey signa... more
A natural or artificial object or struc­ture whose horizontal and sometimes vertical POSITION is obtained by surveying methods. Survey signals are given special designation according to the kind of SURVEY in which they are determined, or which they may later serve.
4769
signal: tidal current
A SIGNAL or message conveying information on condition of TIDAL CURRENT in the area in question.
4770
signal: tide
A SIGNAL or message conveying information on tidal conditions in the area in question.
4771
signal: time
An accurate SIGNAL marking a specified TIME or time interval. It is used primarily for deter­min­ing ERRORS of TIMEPIECES. Such SIGNALS are ... more
An accurate SIGNAL marking a specified TIME or time interval. It is used primarily for deter­min­ing ERRORS of TIMEPIECES. Such SIGNALS are usually sent from an observatory by RADIO, but visual SIGNALS are used at some PORTS.
4772
signal: topographic
Any object, existing or specially erected, used for the CONTROL of TOPOGRAPHIC SURVEY.
4773
signal: triangulation
A rigid structure erected close or over a TRIANGULATION STATION. Also any object, natural or artificial, whose POSITION is obtained in a tri... more
A rigid structure erected close or over a TRIANGULATION STATION. Also any object, natural or artificial, whose POSITION is obtained in a triangulation survey. The term may be applied to a structure whose POSITION is determined by TRIANGULATI­ON, but whose primary purpose is to serve later in a HYDRO­GRAPHIC or TOPOGRAPHIC SURVEY, when it may become known as a HYDROGRAPHIC or TOPOGRAPHIC SIGNAL.
4774
signal: tripod
A three-legged TRIANGULATION SIGNAL. It is usually constructed in such a manner that an obser­ver can set up his THEODOLITE and make OBSERVA... more
A three-legged TRIANGULATION SIGNAL. It is usually constructed in such a manner that an obser­ver can set up his THEODOLITE and make OBSERVA­TIONS without moving any of the structure.
4775
signal: water
A HYDROGRAPHIC SIGNAL erected in SHALLOW WATER.
4776
signal: weather
A visual SIGNAL displayed to indicate a WEATHER FORECAST.
4777
signal lamp
See LAMP.
4778
signal station
A place on SHORE from which SIGNALS are made to ships at sea.
4779
signi
Abbreviation for Signalisation de Navigation Intérieure. A system of buoyage used in certain inland waters in the Netherlands.
4780
sill
A SEAFLOOR barrier of relatively shallow DEPTH restricting water movement between BASINS.