QuadraBeam PLUS™ Sonar
(with optional-purchase QuadraBeam
PLUS™ transducer)
QuadraBeam PLUS™ sonar provides a
wide
90°
area
of
coverage.
QuadraBeam PLUS™ starts with two
fan-shaped 35° 455 kHz Side Structure
locating sonar beams to spot fish, bait,
and structure to the left and right of the
boat over an area of the bottom that’s
always equal to twice your depth.
For a detailed view below the boat,
QuadraBeam PLUS™ uses DualBeam
PLUS™ technology, with precision 20°
and wide 60° beams. QuadraBeam
PLUS™ finds more fish faster, and can
even tell you where to put your bait by
showing if fish are to the left, right, or
directly beneath your boat.
NOTE:
Contact our Customer Resource
Center to determine which accessory
transducers are compatible with your
Humminbird® Fishing System, or visit our Web
site at
humminbird.com
.
Universal Sonar 2
(compatible w/optional-purchase Minnkota trolling motors)
Your Fishing System supports Universal Sonar 2, a state-of-the-art,
integrated and protected transducer that is built into the lower unit of
Minnkota trolling motors. With Universal Sonar 2, all wiring is concealed
inside the indestructible composite shaft—out of sight and out of harm’s
way, with no clamps, ties, or exposed wires. Universal Sonar 2 features new
temperature sensing and the performance of DualBeam PLUS™ technology
(available with all Humminbird® DualBeam PLUS™ models). An expanded
view and greater bottom detail gives you a totally new perspective of the
water below, along with optimal sonar performance to help you find fish.
How GPS and Cartography Work
Your Fishing System also supports GPS (Global Positioning System) and
chartplotting. It uses GPS and sonar to determine your position, display it on
a grid, and provide detailed underwater information.
GPS uses a constellation of satellites that
continually send radio signals to the earth. The
GPS receiver on your boat receives signals from
satellites that are visible to it. Based on time
differences between each received signal, the
GPS receiver determines its distance to each
satellite. With distances known, the GPS receiver
mathematically triangulates its own position.
With 5 updates per second, the GPS receiver
then calculates its velocity and bearing.
90° Total Coverage
Bottom Coverage = 2 x Depth
35°
60°
20°
35°
455 kHz
455 kHz
83 kHz
200 kHz
Introduction
5
Summary of Contents for 858 HD DI
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