AUTONAUTIC INSTRUMENTAL C20 Administrator Guide

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FEATURESC20‐00130MAGNETICCOMPASSOUTFIT
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‐125mm.Reflectorcompassoutfit.
‐Reducedshipyardinstallationwork.
‐Modulardesign.
LEDlighting24–12v.AndemergencyLEDlighting3v.withAAAbatteries
‐Periscopeprovidesthebestimage(+30º‐30º)vision.
‐Covermadewithqualitywaterproofmaterial.
‐ABSbinnaclewithhighimpactresistance.
‐Specialpainttreatmenttoprotectagainstthesalinemist.
‐Compensationsystem.
‐Watertigthnessconnectingbox.
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5
INSTALLATION
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Positioning
IMOResolutionA382(X)MagneticCompassesCarriageandPerformanceStandards
includesasectiononthepositioningofthemagneticcompass.Itisalsostrongly
recommendedthatISO694‐PositioningofMagneticCompassesinShips‐is
compliedwith.If,duetothespecialconstructionofthevessel,itisnecessaryto
deviatefromthese,thentheFlagStateAuthorityshouldbeconsulted,asincorrect
positioningcanaffecttheexpectedperformanceofthemagneticcompass.
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Installation
Detailsandnoteswithintheinstallationdrawingsgiveadequateinformationtocarry
outaninstallation.
Careshouldbetakentoensuretheverticalaxisoftheperiscopeandbinnacleare
parallel.Ifthereisanydoubtastothecapabilityoftheshipyardmethodstoguarantee
this,thenwerecommendthefollowing:‐
a)Fitthebinnacleasperdrawings.
b)Fitthecompassinthebinnacle.
c)Locatetheperiscopeintothebaseofthebinnacleasperdrawing.
d)Holdtheperiscopeinpositionandcheckthatthecompasscardcanbeviewed
throughthemirror.Adjustthepositionifnecessary.
e)Securetheceilingflange.
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2.COMPASSADJUSTING
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Thebinnaclehasacompensationsystembuilt‐in.Thecompassadjustingmustbe
carriedoutbyaprofessionalcompassadjuster.
TheC20binnaclecompassissimpletoadjustorcompensate.Thecompensatorsare
theslottedshaftsintheholesonthecompass;notethattheslotsarepositioned
parallelwiththebottomofthecase.
Withtheslotsinthisposition,thecompensatorsareinneutralandarenotaffecting
thecompassReading.
Turnthecompensatorswithapieceofbrassorcooperofprroperthickness.Donot
useascrewdriver,astheyareoftensteelandmayinterferewiththeadjustingprocess.
BegintheadjustingprocedureafterhavinglocatedN‐SandE‐Worsightingpoints
whosedirectionisreliableknownorcanbedeterminedfromtheCoastandGeodetic
Surveyofthelocalarea.
Asthecompassisstrictlyamagneticdevice,itwillindicateonlymagneticheadings.
Thecompensatorsareusedonlytominimizeanymagneticaffectofmetalpartsofthe
boatandcannotbeexpectedtocorrectthecompassfortruebearings.
1.LineuptheboatonthemarkfortheNorthheadingandobservethecompass
reading.IfitisnotindicatingaNorthheading,turnoneofthecompensatorsshaft
slowlyuntiltheReadingisNorth.
2.TurntheboattotheEastmakerandcorrectforone‐halftheerrorobservedby
turningtheothershaft.
3.Repeatthestepsabove,ifnecessary,correctingforone‐halfobservederrorineach
direction.

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5
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3.MAINTENANCE
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CompassBowl
Thecompassbowlshouldberegularlyinspectedtoensurethattherearenoleaksor
bubbles.Inaddition,theupperandlowerglassshouldbemaintainedinaclean
condition,andthecompassgimballingchecked.
Afewtimesperyear,andmoreregularlyonvesselswithhighvibrationlevelsor
followingheavyweather,anoperationaltestshouldbecarriedoutonthemagnetic
compasstoensurethatnofrictionhasdevelopedonthepivotandjewel.This
operationaltestshouldbecarriedoutasfollows:‐
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Whilstthevesselisalongside,bringamagneticobjecttowardsthecompasssothatthe
headingisdeviatedby2degrees.Holdthedeviatedcompasscardinthispositionfor
10seconds,andthenreleasebyremovingthemagneticobject.Whenthecompass
cardsettlesitshouldbewithin15secondsofarcoftheoriginalheading.Ifthe
compasscarddoesnotreturnwithinthislimitthenthereisahighleveloffriction
betweenthepivotandjewel.Thecompassshouldbeoverhauledbyacompetent
authority.
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Binnacle
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TheC20Binnaclehasoneofthesimplestperiscopearrangements,utilisingonly
onelensandmirror.Thelensiseasilyremovedforcleaningatperiodicintervalsfrom
theforewardsideofthebinnacle.
Theonlyareawheremaintenancemayberequirediswiththebinnaclelighting.There
aretwoLEDlampswithinthebinnacle,andanadditionalspare,allaccessibleby
removingthebinnacle.