How Sonar Works - Lowrance X515C DF Operation Instructions Manual

Transmitter:....................X-515cDF:
Sonar sounding
depth capability:............X-515cCDF: 2,500 feet (762 meters).
Depth display: ................Continuous display.
Audible alarms: ..............Deep/shallow/fish/zone.
Automatic ranging: .......Yes, with instant screen updates.
Auto bottom track: ........Yes.
Zoom bottom track:.......Yes.
Split-screen zoom: .........Yes.
Surface water temp: .....Yes.
Speed/distance log: .......Optional (requires optional speed sensor).
NOTICE!
The storage temperature range for your unit is from -4 degrees to +167
degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended
storage in temperatures higher or lower than specified will damage the
liquid crystal display in your unit. This type of damage is not covered by
the warranty. For more information, contact the factory's Customer
Service Department; phone numbers are listed on the last page.

How Sonar Works

Sonar has been around since the 1940s, so if you already know how it
works, skip ahead to the next segment on the typographical conventions
used in this manual. But, if you've never owned a sonar fish finder, this
segment will tell you the under water basics.
Sonar is an abbreviation for SOund NAvigation and Ranging, a technol-
ogy developed during World War II for tracking enemy submarines.
(Lowrance developed the world's first transistorized sportfishing sonar in
1957.) A sonar consists of a transmitter, transducer, receiver and dis-
play. In simple terms, here's how it finds the bottom, or the fish:
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4,000 watts peak-to-peak/500 watts RMS.
X-510c:
2,400 watts peak-to-peak/300 watts RMS.
X-510c: 800 feet (244 meters).
Actual capability depends on transducer con-
figuration and installation, bottom composi-
tion and water conditions. All sonar units
typically read deeper in fresh water than in
salt water.
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email: info@busse-yachtshop.de