Dualbeam Plus Sonar; Down Imaging Sonar - Humminbird HELIX 5 SONAR Operation Manual

20˚
60˚
200kHz
83kHz
60 Degree Total Coverage
Bottom Coverage = 1 x Depth
45°
800kHz
455kHz
16°
455kHz
28°
200kHz
75 Degree Total Coverage

DualBeam PLUS Sonar

(HELIX SONAR)
The HELIX SONAR Fishfinder uses a 200/83 kHz
DualBeam PLUS sonar system with a wide (60°) area
of coverage. DualBeam PLUS sonar has a narrowly
focused 20° center beam, surrounded by a second
beam of 60°, expanding your coverage to an area
equal to your depth. In 20 feet of water, the wider
beam covers an area 20 feet wide.
DualBeam PLUS sonar returns can be blended
together, viewed separately, or compared side-by-
side. DualBeam PLUS is ideal for a wide range of
conditions - from shallow to very deep water in both
fresh and salt water. Depth capability is affected by
such factors as boat speed, wave action, bottom
hardness, water conditions, and transducer
installation.

Down Imaging Sonar

(HELIX DI)
The HELIX 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
75°
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 28° 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.
3
Introduction