The FF918 uses sonor technology to send sound waves from the transducer into the
water. The returned “echoes” are plotted on the display, creating a very accurate
picture of the underwater world, including distance to underwater objects such as
the bottom, fish and structure.
When used with the Portable cable Transducer,
your FF918 uses a 200 kHz sonar system with
a wide (45 ) area of coverage. From shallow to
very deep water in both fresh and salt water.
Boat speed, wave action, bottom hardness,
water conditions and transducer installation
can all affect depth capability.
Display View
The FF918 displays underwater information in an easy-to-understand format. The
top of the display corresponds to the water surface at the transducer, and the bottom
of the display corresponds to the Depth Range automatically selected for the current
water depth. The Bottom Contour varies as the depth under the boat changes.
Digital readouts provide precise information for depth, fish and water temperature.
As the boat moves, terrain and bottom composition variations are displayed. Fish,
baitfish and thermoclines (underwater temperature changes) are displayed when
detected. Underwater conditions vary greatly, so some experience and
interpretation is needed to realize all the benefits of the FF918 use the picture as a
guide to the most common conditions and practice using the FF918 over known
bottom types.
Powering ON and OFF
Press and release the POWER-MENU key to power the FF918 on. Press and hold
the POWER-MENU key until the unit shuts down to power off.
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Display
UP Arrow Key
POWER/MENU key
Down Arrow Key
Water temperature
Battery strength indicator
Bottom contour
Lower zoom range
Cable transducer connect indicator
Large fish indicator
fish icon depth
Upper zoom range
water surface line
water depth
