Raymarine ST40 Speed, Owner'S Handbook Manual, Page: 19 / 46

Chapter 3: Installation
11
57 mm
(2.25 in)
51 mm
(2.0 in)
D4643-1
Note: If you intend fitting a nonstandard transducer, extra tools may
be required
Site requirements
Transducer
The transducer types required for the various hull types are as follows:
Hull material Transducer type
Glass reinforced plastic (GRP) M78712 Through hull plastic
Steel (supplied as standard)
Aluminium
Wood M78716 Through hull bronze
Other transducer types are also available for specific requirements. For
further details, contact your local Raymarine dealer.
D4446-2
Plastic through hull speed transducer dimensions
14 mm
(0.57 in)
100 mm (3.95 in)
75 mm (2.94 in)
diameter
51 mm (2.0 in)
diameter
75 mm (2.94 in)
diameter
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