Humminbird 345c, 345C DI Down Imaging™ Sonar, 345c DI

45° 800kHz

455kHz75°

16°

455kHz

25°

200kHz

75 Degree Total Coverage

Down Imaging™ Sonar

(Down Imaging™ models only [345c DI])

Your 345c DI Fishfinder uses Down Imaging™ technology. The Down Imaging™ transducer scans the water with razor-thin, high-definition beams. The beams are wide (side to side) but very thin front to back.

The Down Imaging™ beams can be operated at two frequencies: 455 kHz (75°) or 800 kHz (45°). Select 455 kHz for the best overall image quality and depth. Select 800 kHz for the sharpest image. See Sonar Menu Tab: Imaging Frequency for more information.

The transducer also uses conical beams to provide data in traditional 2D format (see What’s on the Sonar Display). Select 455 kHz for a narrowly focused 16° center beam, or select 200 kHz for a wider 25° beam (see Sonar Menu Tab: Beam Select).

Depth capability is affected by such factors as boat speed, wave action, bottom hardness, water conditions, and transducer installation.

How Sonar Works 5