Dead Rise Angle - Raymarine DownVision CPT-70 Installation Instructions Manual

7.1 Dead rise angle

The dead rise angle is the angle of the vessels hull
from the centerline. The transducer can be installed
on vessel with a dead rise angle of 0° to 25°. The
transducer should not be installed on a vessel with a
dead rise angle of greater than 25°.
1
1 Waterline
2 Centerline
3 Dead Rise Angle
4 Parallel with waterline
The dead rise angle should be measured on the
outside of the hull using an angle finder or similar
device.
Cutting the dead rise / fairing block
The block must be cut to the shape of the hull.
Note: The illustrations below depict the fairing
block supplied with the CPT-80 and CPT-120,
however cutting and orientation requirements for
the CPT-70 and CPT-110 are the same.
The orientation of the cut depends on whether the
installation is port or starboard side.
2
1. Vessel bow (viewed from front)
2. Cut for starboard side installation
3. Cut for port side installation
32
4
1
3
1
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1 Fence to blade distance
2 Parallel to waterline
3
Example slope of hull
4 Dead rise angle 0° to 25°
5 Front of block facing forward
1. Calculate the dead rise angle.
The dead rise angle should be measured on
the outside of the hull from the location that the
transducer is to be mounted using an angle finder
or similar device.
2. Adjust the band saw table to the required dead
rise angle.
3. Adjust the band saw's fence to the distance
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specified in the fence to blade table.
4. Position the block against the fence so that the
top face of the block sits against the fence.
5. Recheck steps 1 to 4.
6. Cut the block.
1 Band saw
2 Blade
3 Fence (cutting guide)
4
Dead rise / fairing block
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5 Dead rise angle
6 Band saw table
2 3
1
4
5
CPT-70 / CPT-80 / CPT-110 / CPT-120
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