Raymarine Transducers, User Manual, Page: 40 / 56

34 Transducers for Fishfinders
Installation
1. Measure the deadrise angle of the hull at the selected location
using a level and protractor (see Figure 2-14 ). Measure carefully,
since the installed transducer must be within 5 ° of vertical.
WARNING:
Always wear safety goggles and a dust mask.
2. The hull surface to be bonded must be smooth and free of paint or
any other finish. If the surface is rough, use a disc sander to
smooth an area 4" (100 mm) in diameter.
3. Remove any dust, grease or oil with a weak solvent, such as alco-
hol, to ensure a good bond. Clean and dry both the selected area
and the underside of the base.
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 2-14: 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-
15 ).
D5002-2
Deadrise angle
Flange
Base Hull
Parallel to waterline
Guideline
perpendicular
to keel