2
How Sonar Works
Sonar technology is based on sound waves. The 700 Series™ Fishing System uses
sonar to locate and define structure, bottom contour and composition, as well as
depth directly below the transducer.
Your 700 Series™ Fishing System sends a sound wave signal and determines distance by
measuring the time between the transmission of the sound wave and when the sound
wave is reflected off of an object; it then uses the reflected signal to interpret location,
size, and composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth of 240 ft
(70 m) and back again in less than 1/4 of a second. It is unlikely that your boat can
"outrun" this sonar signal.
SONAR is an acronym for SOund and NAvigation
Ranging. Sonar utilizes precision sound pulses or
"pings" which are emitted into the water in a teardrop-
shaped beam.
The sound pulses "echo" back from objects in the water
such as the bottom, fish and other submerged objects.
The returned echoes are displayed on the LCD screen.
Each time a new echo is received, the old echoes are
moved across the LCD, creating a scrolling effect.
When all the echoes are viewed side by side, an easy to
interpret "graph" of the bottom, fish and structure
appears.
1
Views Menu Tab 103
Accessories Menu Tab 103
Using Screen Snapshot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Troubleshooting 105
700 Series™ Doesn’t Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
700 Series™ Defaults to Simulator with a Transducer Attached . . . . . . . . . . . . . . . . . . . . . . 107
Display Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Finding the Cause of Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
700 Series™ Fishing System Accessories 110
Specifications 111
Glossary 112
Contact Humminbird® 127
NOTE: Entries in this Table of Contents which list (International only) are only available
on products sold outside of the U.S. by our authorized International Distributors. To
obtain a list of authorized International Distributors, please visit our website at
www.humminbird.com or contact our Customer Resource Center at
1-800-633-1468
to
locate the distributor nearest you.
NOTE: Entries in this Table of Contents which list (with PC Connect Cable only) or (with
Optional-Purchase QuadraBeam
TM
/WideSide® Transducer) or (with Temp/Speed only)
require the purchase of separate accessories. You can visit our website at
www.humminbird.com to order these accessories online or contact our Customer
Resource Center at
1-800-633-1468
.
