Brochure

When is a CHIRP Fish Finder not just another CHIRP Fish Finder? When it’s Furuno’s TruEcho CHIRP!
Designed to sweep across 90 frequencies utilizing a CHIRP transducer, the new DFF1-UHD delivers pro-
fessional grade sh nding technology into a network Fish Finder.
CHIRP Fish Finders mark individual game sh and bait sh, even when tightly schooled together or near
the sea oor. Standard, non‐CHIRP Fish Finders operate at one or two individual frequencies and are
generally capable of detecting targets and displaying them
only within those narrow frequency bands. CHIRP Fish Find-
ers transmit pulses across a wide range of frequencies. The
DFF1-UHD uses a precise sweep pattern across 90 frequen-
cies (50 kHz +/- 20 kHz, 200 kHz +/- 25 kHz) within a long‐
duration transmission. This allows Furuno’s superior Digital
Signal Processing (DSP) to display targets with unparalleled
clarity, accuracy and resolution. You will also benet from
better shallow water performance, tracking of the bottom,
and improved detection of thermoclines.
Why CHIRP?
Furuno TruEcho CHIRP - So much more than just a CHIRP Fish Finder!
Why Furuno’s TruEcho CHIRP?
Furuno’s TruEcho CHIRP Fish Finder is based on completely new technology utilizing broadband CHIRP transducers. The
sound energy transmitted by the DFF1-UHD into the water is up to 1,000 times greater than a conventional
Fish Finder, resulting in more energy on the target. Utilizing our Furuno Digital Filter (FDF) signal processing
results in up to 5x greater resolution and depth capability than comparably powered standard Fish Find-
ers. Furuno is evolving CHIRP technology to the next level by adding unique capabilities, such as Bottom
Discrimination and Accu-Fish.
Bottom Discrimination provides detailed graphical information about the make-up of the sea oor. This
is accomplished by placing the bottom into one of four classications; Rocks, Gravel, Sand, and Mud.
Knowing the make-up of the bottom provides valuable information that will help you locate rich shing
grounds, potential hazards, and even good anchoring spots. The bottom details are shown on the
screen in either a graphical representation or probability graph.
Benefits of CHIRP Technology
Scans across a range of frequencies
Enhanced depth penetration, resolution & clarity
Precise separation between bait sh and game sh
Enhanced ability to distinguish targets from noise
using improved signal to noise ratio
Improved bottom tracking at high speeds
Vastly improved shallow water performance
Reveals more sh by eliminating surface clutter & noise
➤
➤
➤
➤
➤
➤
➤
Please keep the following in mind when using the Bottom Discrimination Sounder:
1) Use at a depth of 5 m - 150 m.
2) Use an approved transducer.
3) To show a consistent display of the actual bottom, set the range display of the Fish Finder screen to “auto”.
4) Enter the ship’s draft value
5) Use a ship speed of 10 knots or less.
6) In some instances, bottom component indicated on the display may differ slightly from its actual bottom structure.
Graphic mode
The standard graphic display mode shows the most
probable bottom composition graphically as shown above.
Probability mode
The probability display mode shows the most
probable bottom composition in graph form.
Rocks
Gravel
Sand
Mud
Rocks
Gravel
Sand
Mud
Accu-Fish is a revolutionary sh size
assessment function that can tell you
the approximate size of the sh below
your boat. Fish symbols appear on the
screen, along with the size of the sh or the depth where
it found the sh.
It can detect sh
size from 4 inches
up to about 6 feet
long, in depths of
7 feet to well over
300 feet of water.