Humminbird 757c Fish Finder User Manual


 
3
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.