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.
[. . . ] · Fastmovingobjectslikemackerel andtunaaredetectedfurtheraway thanwithCW(continueswave) usingtheHyperbolicFMmode. · 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. 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. 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. Themackerelcanbeseenasalong "stripeoffish"aheadofthevesselin bothhorizontalandverticalviews. [. . . ] 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. Themackerelcanbeseenasalong "stripeoffish"aheadofthevesselin bothhorizontalandverticalviews. [. . . ]
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