User manual SIMRAD HULL UNIT OUTLINE SCHEMA REV A
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Manual abstract: user guide SIMRAD HULL UNIT OUTLINESCHEMA REV A
Detailed instructions for use are in the User's Guide.
[. . . ] · Inareaswithhardbottom, longer detectionrangeisaccomplished bycombininganarrowtransmitter beamwithaspecialdesigned narrowreceiverbeam. This removesmostofthedisturbing bottomechoesfromthesidelobes, commonlyseenonothersonar models. · Thereceiver'swidedynamic rangeeasilyidentifiesschoolswith differentdensities. It alsoseparateshard fromsoftbottom. SelectableNarrow, MediumandWide beamwidthstiedin withlong, medium andshortrangesettings improvecloserangedetection. [. . . ] SelectableNarrow, MediumandWide beamwidthstiedin withlong, medium andshortrangesettings improvecloserangedetection. At30kHzoperatingfrequency, the beamwidthisonly6. 7°. Anew180°verticalviewtiltable downto90°isspeciallydesigned forpelagictrawlers. Newandfasterfullcirclebeam stabilizationensuresbetterfish detectioninpoorweatherand/or whenfishingclosetothesurface.
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· Thelongrangeandhigher definitionoftheHULL UNIT OUTLINEimproves yourcatchingabilities, andhelps youtomakebetteruseofyour timeatsea.
Horizontal and vertical beams
Thecombinationof erticalandhorizontal v presentationsshowyoutheschoolsoffishboth fromaboveandfromthesideatthesametime. Itisnotnecessarytogoovertheargettosee t theverticaldistributionontheechosounder.
Bow up/180° vertical
Theverticalsliceismade"tippable", andby selectinga60°tipangle(orless), afull180° coverageisobtained. Thetipanglecanbe adjustedfrom+10to-90°. Thismodeisideal whenyouaretrawlingforfishondeepwater.
Beam stabilization
Whenthebeamstabilizerisactivated, boththe orizontalandverticalbeamsare h electronicallystabilizedforrollandpitch. The fullcirclebeamstaysontheargetindependent t ofthevessel ovement, eveninroughseas. m
SIMRAD HULL UNIT OUTLINE
Off center presentation
Offsetthevesseltoanyscreen positionandenlargetheechoesfor moredetailedinformation.
Operating panel
Adedicatedoperatingpanel providesfastandeasyaccesstothe mostfrequentlyusedfunctions. A Mainswitch:Powerthesonaron (andoff), lowerthetransducer B Symbol:Controlthetarget markersprovidingexactlatitude andlongitudepositioning. Wetransmitanarrowforward-looking fan-shaped180°widebeam. Thefan beamcanbetiltedfrom+10°and downto-90°. Thisfeatureisspecially designedforpelagictrawlers.
20 to 30 kHz
ThisisanotheruniqueSimrad feature. TheHULL UNIT OUTLINEsonartransmits alongpulsewithacontinuously variablefrequency. Thereceiver listensforanechowiththesame frequencyvariations. Echoeswith differentfrequencysignaturesare vastlyreduced. Theactualfishechoes areenhanced, andfishdetectionis madeeasierunderdifficultconditions. HyperbolicFMgivesyou30times betterrangeresolutionthancommon CWtransmissions.
Large dynamic range
TheHULL UNIT OUTLINEsonarcanstore displaypresentationsmanuallyor automatically, andyoucanrecall theselaterforfurtherstudies. Allthe picturesinthisdocumentarescreen capturesfromactualsituationsonthe fishinggroundsfromvesselsalready usingtheHULL UNIT OUTLINEsonar.
User settings
TheHULL UNIT OUTLINEsonarcanoperateon 11differentfrequenciesfrom20to 30kHz. Lowerfrequencygiveless absorptionandwiderbeamforlong rangeindeepwater, whererange islimitedbysalinity. Thehigher frequenciesprovidenarrowerbeams foruseinshallowwaterswererange islimitedbyreverberation. Youwill alsoavoidinterferencefromother sonarsinthearea
Narrow sound beams
Pickingtherightschoolis important. Dynamicrangemeansthat youcantellthedifferencebetweena scatteredschoolprovidingaweaker echo, andadenseschoolgivinga strongerecho. Lookingatthebottom echo, youcaneasilytellsmoothfrom roughbottom. Thisisimportantwhen purseseininginshallowwater, and duringpelagictrawlingwherethe footropecantouchthebottom.
Stabilized beams
Thesonarcanstoreanunlimited numberofusersettingsfordifferent fishingconditionsanddifferent operators. Sonarsettingsareoften personal, andmostcaptainshave favoritesettingsfordifferenttypesof fishing, species, timeofdayetc. On theHULL UNIT OUTLINEyoucanhaveyourfavorite settingsstoredandnamedjustasyou like.
Noise filter
Thenoisefilterwillsuppress propellernoise, interferencefrom otheracousticsystemsonyourown vesseloronothervesselsnearby.
Unlikeothersonars, theHULL UNIT OUTLINEboth transmitsandreceiveswithnarrow beams. Narrowbeamsareimportant inordertoavoidfalseunwanted echoesfrombottomandsurface, this limitsthedetectionrange. At30kHz thetransmitbeamisonly6. 7°wide. Thereceiverbeamisonly7. 4°.
Selectable beam width
TheHULL UNIT OUTLINEsonarisvertically stabilizedevenly360°aroundthe ship, bothforthehorizontalaswell astheverticalbeams. Thestabilized sonarbeamsenhancefishdetectionin poorweathermakingsearchingstill possibleinsituationsyouearliergave up.
Dual mode
Withanarrowbeamyou continuouslyneedtooperatethetiltto keepthebeamontheschool. During thebusycatchingtime, twowider verticalbeamscanautomaticallybe selected. Targettrackingisthenmade lessdependentonthetiltangle.
Conditionsmaysometimeschange veryquicklyevenwithinafewhours. Withthedualmodefeatureyoucan setuptwodifferentsonarpictures onthemonitor. Onepictureshows yournormalsettings, whiletheother isusedtotestnewsettings, filters, modes, pulselengths, frequencies,
SIMRAD HULL UNIT OUTLINE Mackerel detection
Theschoolofmackerelisdead aheadofthevessel. Itcannotbee seeninthehorizontalview, onlyin theverticalview. Thetiltindicator shownintheverticalpicturetellsyou thatyouneedmoretiltinorderto seetheschoolinthehorizontalview. Theschoolisclearlyshowninthe verticalviewatabout200meteraway fromthevessel. Theverticalviewis primaryusedtomeasurethedepthof theschool. Thisviewisprovidedso youdonotneedtosaildirectlyover theschool. Thiswouldscatterthefish, andbreakuptheschoolinseveral smallerparts. Theverticalviewthus makesiteasiertocatchthefish. Operationalfrequencyis30kHzusing HyperbolicFMtransmission.
Looking into the seine
"Offcentre"modeisselected toobtainbetterresolutioninthe directionoftheschoolinhorizontal andverticalviews. TheHULL UNIT OUTLINEhasasuperbshortrange detection. Inthisscreencapturethe sonarisoperatedwitha300meters rangesetting, andthefishisnomore than50metersfromthevessel, as clearlyseeninboththehorizontaland theverticalpresentation. Inthetop righthandcornerallPIdepthsensors arefullymarkeddownto80fathoms.
SIMRAD HULL UNIT OUTLINE Scattered mackerel detection
TheHULL UNIT OUTLINEsonarisoperatedat30 kHz. Thisupperfrequencyisselected becauseitwillprovidethenarrowest beam. At30kHz, noothersonars caninterferwiththeperformanceof thissonar, evenwithmulitplesimilar sonarswereoperatinginthearea. [. . . ] Theschoolisclearlyshowninthe verticalviewatabout200meteraway fromthevessel. Theverticalviewis primaryusedtomeasurethedepthof theschool. Thisviewisprovidedso youdonotneedtosaildirectlyover theschool. Thiswouldscatterthefish, andbreakuptheschoolinseveral smallerparts. Theverticalviewthus makesiteasiertocatchthefish. Operationalfrequencyis30kHzusing HyperbolicFMtransmission.
Looking into the seine
"Offcentre"modeisselected toobtainbetterresolutioninthe directionoftheschoolinhorizontal andverticalviews. TheHULL UNIT OUTLINEhasasuperbshortrange detection. Inthisscreencapturethe sonarisoperatedwitha300meters rangesetting, andthefishisnomore than50metersfromthevessel, as clearlyseeninboththehorizontaland theverticalpresentation. Inthetop righthandcornerallPIdepthsensors arefullymarkeddownto80fathoms.
SIMRAD HULL UNIT OUTLINE Scattered mackerel detection
TheHULL UNIT OUTLINEsonarisoperatedat30 kHz. Thisupperfrequencyisselected becauseitwillprovidethenarrowest beam. At30kHz, noothersonars caninterferwiththeperformanceof thissonar, evenwithmulitplesimilar sonarswereoperatinginthearea. [. . . ]
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