Humminbird 531427-1_D - Manual (Page 10)

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DualBeam PLUS™ Sonar
Your 700 Series™ Fishing System 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.
QuadraBeam™ Sonar
(with optional-purchase QuadraBeam TM transducer)
Your 700 Series™ Fishing System also supports
QuadraBeam™ sonar with the purchase of an
additional QuadraBeam™ transducer. QuadraBeam™
sonar provides an extremely wide 90° area of
coverage. QuadraBeam™ starts with two 45° 455 kHz
beams for a continuous 90° of uninterrupted side to
side coverage to 160 feet. These Side Structure
locating beams reveal fish and structure to the left
and right of your boat near the bottom. For structure
directly below your boat, Quadrabeam™ uses
DualBeam PLUS™ technology.
90° Total Coverage
Bottom Coverage = 2 x Depth
35° 60° 20° 35°
455 kHz 455 kHz
83 kHz
200 kHz