Raymarine L470 Selecting the Correct Type of Transducer, Use a transom-mount transducer if

M78898	M78923	M99-142
Transom-mount	Thru-hull	Fairing for
transducer	transducer	thru-hull transducer

M78946	M78930	M78929
In-hull	Sidelooker	Sidelooker
transducer	transducer for	transducer for
	transom mount	trolling motor

Fig. 2-1

Transducer Types

Selecting the Correct Type of Transducer

Before you begin the installation, double-check to be sure you have the correct type of transducer. Each kind of transducer is designed for a particular type of use. In this manual we will include detailed mounting instructions for the transom-mount transducer. We will also include some general information on the other types. For detailed information on these other transducers, see the instructions which are packaged with the unit.

Use a transom-mount transducer if –

. . . your boat has an outboard or inboard-outboard engine(s), and if you’re planning to use the Sidelooker option. This type of transducer must be mounted ahead of or beside the propeller(s). Do not use this type of transducer for a boat with a straight-shaft inboard engine.

Use a thru-hull transducer if –

. . . your boat has a straight-shaft inboard engine. This type of transducer is installed in a hole drilled through the hull.

Use an in-hull transducer if –

. . . you have a high-speed boat or if, for some reason, you cannot use a transom-mount or thru-hull transducer. The hull may be no more than 1" thick.

Installation 5