Navman THROUGH HULL AND IN-HULL Installation Manual
Also see for 25982: Installation manual
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6 Through hull & In-hull transducer installation manualNAVMAN2-2 Installing a through hull transducer1 Select a suitable position for thetransducer (see section 2-1).If the hull panel is too thin or the panelmight not be strong enough, considerfitting a reinforcing pad on the inside ofthe hull.2 Find the hole size required for thetransducer from the table above. Drill orcut the hole in the hull. The hole must beperpendicular to the hull surface.3 For an insertable transducer:i remove the locking nut or pinrom the fittingii pull the transducer out from thehull fittingiii unscrew the nut from the hull fitting.For a fixed transducer:i unscrew the nut from the hull fittingii hold the nut just inside the holein the hulliii feed most of the transducer cablethrough the hole in the hull (from theoutside) and through the nut.4 Apply a thick layer of flexible beddingcompound (such as Sikaflex) to the2-1 Positioning a through hull transducerThis transducer will be fitted in a hole drilledin the bottom of the boat. Select a positionfor the transducer that has a smooth flow ofclear water over the transducer surface at alltimes. This means that the transducer shouldbe ahead of any keel, hull projections, hullopenings, paddle wheel transducers, propellersor propeller wash. If the bottom of the boat ispainted and the boat has been used, do notmount the transducer where the paint is eroded(an indication of turbulence).In addition, position the transducer:as close to the middle line of the hull aspossible and as deep as possiblewhere the deadrise angle is smallwith sufficient space inside the hull foraccess and wiringso that it will not interfere with launchingor retrieving the boatIdeally a depth transducer should be fitted sothat its axis is vertical, however it can be up to15° off vertical.Planing or displacement boatSailing boatSuitablelocations fortransducerRemovetransducerInsertable transducerFixed transducerRemove lockingnut or pinUp to 15° |
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