Down imaging™ sonar – Humminbird 300 SERIES 345C DI User Manual

Page 14

Advertising
background image

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.

75 Degree Total Coverage

16°

75°

25°

455kHz

200kHz

455kHz

45°

800kHz

How Sonar Works

5

Advertising
This manual is related to the following products: