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Sonar Overview
SONAR OVERVIEW (SO
NAR
, DI, SI, CHIRP)
A
functioning transducer must be attached to the control head to enable sonar functions. To purchase accessory transducers, visit
o
ur Web site at humminbird.com.
NOTE: Depth capability is affected by such factors as boat speed, wave action, bottom hardness, water conditions, and transducer
installation.
DualBeam PLUS Sonar (HELIX SONAR G2, HELIX CHIRP GPS G2)
The DualBeam PLUS sonar beams provide conical coverage directly below the
boat. DualBeam PLUS sonar returns are displayed on the traditional (2D) Sonar
Views. The beams can be blended together, viewed separately, or compared side-
by-side.
The transducer 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. The 83/200 kHz transducer
can provide depth coverage up to 1500 feet (500 m).
HELIX CHIRP GPS G2:
If your transducer is also a CHIRP transducer, you can
operate the beams at different frequency ranges. CHIRP sonar sends continuous
sonar pulses at varying frequencies to provide more detailed returns and better
target separation. For more frequency range information, see Set Up Sonar: Adjust
2D CHIRP.
60 Degree Total Coverage
60˚
2
0˚
200kHz
8
3kHz
60 Degree Total Coverage
200kHz
60˚
20˚
83kHz
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