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FOREWORD
Thank you for purchasing the CH-270 Color LCD Searchlight Sonar. We are confident you
will discover why FURUNO has become synonymous with quality and reliability.
Dedicated in the design and manufacture of marine electronics equipment for more than
half a century, FURUNO Electric Company has gained an unrivaled reputation as a world
leader in the industry. This is the result of our technical excellence as well as our worldwide
distribution and service network.
Please carefully read and follow the safety information and operating and maintenance
instructions set forth in this manual before attempting to operate the equipment and conduct
any maintenance. Your sonar will perform to the utmost of its ability only if it is operated and
maintained in accordance with the correct procedures.
Features
The CH-270 displays underwater objects on a bright 10.4-inch color LCD display, in 8 (or
16) colors according to received echo strengths. Alternatively, the interface unit permits
connection of a commercial CRT or LCD monitor to act as the main, backup or remote
display. Operating frequency is 180 kHz.
The main features of the CH-270 are
• High definition active matrix color LCD.
• Target lock on a fish school or stationary position (reef, etc.).
• Audible detection of echoes frees the operator from continuous watch of the display.
• Compact display and hull units permit installation where space is limited.
• Interface IF-8000 permits use of a commercial monitor in lieu of FURUNO-supplied
display unit.
• Automatic pulselength switching for optimum performance in short and long ranges.
• Eight operational modes: Horizontal, Horizontal Expansion, Vertical Scan, Echo Sounder,
Horizontal/Vertical Scan, Horizontal/History, Horizontal/Video Plotter and
Horizontal/Strata.
• Automatic retraction of transducer at operator-chosen ship’s speed between 5 and 15
knots.
• CUSTOM MODE keys provide one-touch setup of the equipment or short-cut key
function.
• Tracing of ship’s track with connection of position-fixing equipment (GPS, etc.).
• One of the echo strengths may be displayed in white to enhance the specific echo level.
• The “Vertical Search” feature provides a cross-sectional view of the vertical plane, which
is useful for evaluating fish school concentration.