Site Requirements; Transducers - Raymarine ST40 Bidata Owner's Handbook Manual

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Chapter 3: Installation
Note: If you intend fitting a nonstandard transducer, extra tools may
be required

Site requirements

Transducers

The transducer types required for the various hull types are as follows:
Hull material
GRP
Steel
Aluminium
Wood
Speed transducer
M78712 Through hull plastic
(supplied as standard)
M78716 Through hull bronze
75 mm (2.94 in)
diameter
Depth
51 mm (2.0 in)
diameter
75 mm (2.94 in)
diameter
(0.19 in)
Plastic through hull transducer dimensions
57 mm
(2.25 in)
51 mm
(2.0 in)
D4643-1
Depth transducer
M78713 through hull plastic
(supplied as standard) or
M78718 Retractable through hull
M78714 Through hull bronze
Speed
5 mm
75 mm (2.94 in)
diameter
51 mm (2.0 in)
14 mm
diameter
(0.57 in)
75 mm (2.94 in)
diameter
17
D4447-2

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