Raymarine DownVision CPT-70 Installation Instructions Manual page 27

Retain the top half of the block as this will provide
a level surface inside the hull to tighten the nut
against.
7. Check the bottom half of the block against the
hull to ensure a good fit.
Ensure that the block runs parallel to the
centerline of the vessel.
8. If there are gaps between the block and hull then
use an appropriate file to shape the block until a
precision fit is achieved.
Band saw fence to blade distance
The table below identifies the distance to set the
band saw's fence from the blade depending on your
dead rise angle.
1
2
3
1. Blade
2. Fence to blade distance
3. Fence
Dead rise angle
0°
1°
2°
3°
4°
5°
6°
7°
8°
9°
10°
11°
12°
13°
14°
15°
16°
17°
18°
Mounting — CPT-70 / CPT-110
D13362-1
Fence to blade distance
18.5 mm
18.0 mm
17.5 mm
17.1 mm
16.6 mm
16.1 mm
15.6 mm
15.1 mm
14.6 mm
14.1 mm
13.6 mm
13.1 mm
12.6 mm
12.1 mm
11.6 mm
11.1 mm
10.6 mm
10.0 mm
9.5 mm
Dead rise angle
19°
20°
21°
22°
23°
24°
25°
Removing dead rise block locators
When installing the plastic transducer on a vessel
with no dead rise you must remove the locators from
the bottom of the dead rise block.
1
1 Dead rise block
2 locators (for locating on the transducer)
1. Remove the dead rise block from the transducer.
2. Using a suitable saw, cut the locators from the
bottom of the block.
The block is now ready to be used inside the hull as
described in the Mounting the transducer in a hull
without a dead rise section.
Fence to blade distance
9.0 mm
8.4 mm
7.9 mm
7.3 mm
6.8 mm
6.2 mm
5.6 mm
D12959-1
27