Raymarine Transducers, User Manual, Page: 25 / 56

Chapter 2: Installation 19
Figure 2-3: Deadrise Angle and Fairing Thickness
Backing Block
A backing block is used inside the hull to provide a level surface for
the hull nut to seat against (see Figure 2-3 ). After cutting the fairing,
use the remaining section with the cutting guide as the backing block
(see Figure 2-4 ).
Figure 2-4: Transducer Fairing E66023
Cutting the Fairing
1. Measure the deadrise angle of the hull at the selected location
using a digital level, or bubble level and protractor (see Figure 2-
3 ).
2. Tilt the band saw table to the measured angle and secure the cut-
ting fence (see Figure 2-5 ).
Aft View
minimum fairing
thickness
Hull
Slope of hull
Parallel to
water surface
Deadrise angle
Isolation sleeve
D5568-1
Fairing
Backing block
⇐
Cutting guide
Triangular recess
for anti-rotation bolt
BOW
D5567-1