Dualbeam Plus Sonar - Humminbird HELIX 5 SERIES 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 GPS)
The HELIX SONAR GPS 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 GPS)
The HELIX DI GPS 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
How Sonar Works