Kongsberg Simrad EK80 - Vessel Coordinate System

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Reducingrattlenoise
Ensurethatnopartsnearthetransducerscanrattleasaresultofwateroworvibrations.
Reducinginterference
Interferencefromthetransmissionpulsesfromotherhydroacousticinstrumentson
boardthevesselisdifculttoavoid.Theproblemmaybereducedbychoosingthe
workingfrequenciescarefullyandtosomeextentbyseparatingthedifferenttransducers.
Onvesselswithalargenumberofseparatehydroacousticsystemsinstalledandin
simultaneoususe,aseparatesynchronizingsystem(forexampletheK-Sync)should
beconsidered.
Reducingelectricalnoise
ThesepointsmustallbeconsideredtoreduceelectricalnoiseonanEK80system.
•Placethetransducercablesinametalconduitallthewayfromthetransducerto
thetransceiver.Terminatetheconduitasclosetothetransducerandtransceiveras
possible.
•Makesurethatthetransducercablesarecompletelyseparatedfromothercables,
boxes,otherpotentialnoisesources.
•Makesurethatallunitsareproperlygrounded.
•Useshieldedcableswithcorrectgrounding.
•SeparatetheEK80cablesfromothercableswithhighvoltages,largecurrentsor
transients.Placeallhighvoltagepowercablesinmetalconduits.
•IfyoumorethanoneWideBandTransceiver(WBT),installtheseinsuchawaythat
thetransducercableshavethemaximumdistancetothepowerandEthernetcables.
•EnsuremaximumphysicaldistancebetweentheWideBandTransceiver(WBT)and
thePowerSupplyUnit.
•EnsuremaximumphysicaldistancebetweeneachPowerSupplyUnit.
•Ifpossible,installthetransceiversinasonarroomthatiselectricallyshielded.
Relatedtopics
Acousticnoise,page54
Preparations,page43
Vesselcoordinatesystem
Thevesselcoordinatesystemisestablishedtodenetherelativephysicallocations
ofsystemsandsensors.
Whenyouhaveseveraldifferentsensorsandtransducersonyourvessel,andyouwish
eachofthemtoprovideaccuratedata,youneedtoknowtheirrelativephysicalpositions.
Theantennaofapositionsensoristypicallymountedhighabovethesuperstructure,
Preparations