Raymarine DSM300 Install Manual page 53

Chapter 2: Transducer Installation
4. Using a carpenter's square, draw a line on the hull perpendicular to the keel
through the center of the mounting location. This will be used as a guideline
to orient the base.
Figure 2-20: Deadrise Angle
5. The numbers on the flange of the base represent deadrise angles. Identify the
number that most closely corresponds to the deadrise angle of your hull. Find
its match on the opposite side of the flange. Keeping the keel direction arrows
on the side of the base nearest the keel, align the two raised marks indicating
your deadrise angle with the guideline drawn on the hull (see Figure 2-21 ).
CAUTION:
The base must be liquid-tight.
6. When you are satisfied that the location of the transducer is optimal and the
orientation of the base corresponds to the deadrise angle of your boat, apply
a bead of adhesive to the bottom of the base flange. (Follow the adhesive
manufacturer's instructions for use).
Press the flange firmly in place to form a liquid-tight seal and allow the adhe-
sive to cure.
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