Installation manual
SimradMS70
Transduceralignment
TheSimradMS70isaprecisioninstrumentforscienticuse.Inordertoproducedata
thatarebothdetailedandcorrect,itisnecessarytocalibratethesurveyvesselmore
accuratelythanwhatmayhavebeenastandardpracticeearlier.Theresults,withall
measurementstakeninacommonvesselcoordinatesystemmustbeenteredasMS70
operationalparameters.
Thecalibrationtasksinclude:
•measurementofwheresensorsarelocated
•measurementofhowsensorsareoriented
•measurementofthewaterlineverticallocation
•alignmentofangularmeasurementsensors
•determinationofanyoffsetsinsensordata
•determinationofanytimedelaysinsensordata
Topics
•Measurementsonpage36
•Vesselcoordinatesystemonpage37
•Sensorlocationsonpage38
•Measurementaccuracyonpage39
•Transducerorientationonpage41
•Headingsensorcalibrationonpage43
•Alignmentsummaryonpage43
Note
Calibrationmustbetakenseriously.Itisrecommendedthatthistaskandthecontinued
controlofthesoundings’consistencyisassignedtoonemotivatedandqualiedperson
intheorganization.Toachievethebestresults,thecalibrationmustbeplanned
carefully,andmonitoredthroughouttheinstallationandtherstseatrials.Itisalso
recommendedtorepeatthecalibrationprocedureswithregularchecksthroughoutthe
operationofthevessel.
Measurements
Observethisgeneralintroductiontothealignmenttask.
Objectives
Thefollowingmeasurementsmustbemadeafterinstallation:
•thehorizontalandverticalpositionsofthetransducerarray.
•theangularorientationofthetransducerarray
•thehorizontalandverticalpositionsofthemotionsensor
•thehorizontalandverticalpositionsofthepositioningsystem(radioorGPSantenna)
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