Humminbird Matrix 37 - Single Beam Sonar; Dualbeam Plus Sonar; Quadrabeam Sonar

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Single Beam Sonar
Your Matrix 10, 12 or 20 uses a 200 kHz single beam sonar
system with a 20° area of coverage. Depth capability is
affected by such factors as boat speed, wave action, bottom
hardness, water conditions and transducer installation.
DualBeam PLUS™ Sonar
Your Matrix 17 or 27 uses a 200/83 kHz DualBeam PLUS™
sonar system with a wide (60°) area of coverage. 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
Your Matrix 37 Fishing System uses QuadraBeam® sonar.
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
DualBeamPLUS™ technology.