Maintaining the transducer, Using anti-fouling paint – NorthStar Navigation 491 User Manual

Page 12

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SECTION TWO — Installing the transducer

PAGE 8

491 INSTALLATION MANUAL Revision A

FIGURE 2: Recommended transducer incline angle

FIGURE 3: Typical finished thru-hull installation with a fairing

block (Airmar B744V)

Maintaining
the transducer

Do not expose the transducer’s face or plastic housing to gasoline or
strong solvents, such as acetone. These solvents can penetrate and
degrade many plastics and reduce their strength.

Using anti-fouling

paint

The transducer should be coated with water-based anti-fouling paint to
prevent aquatic growth.

3˚ incline

1/3 aft

(Load Waterline Length)

LWL

angle

6–12mm (1/4–1/2")

backing

hull

fairing

multisensor

deadrise

fairing thickness

angle

slope of hull

parallel to

waterline

block

Deadrise angle and fairing thickness (B44V shown)

at narrowest point

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