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FF520 Page 29
The following are examples of Color Settings:
Figure 4.6a - Color Settings item
Figure 4.6b - Examples of Color Settings: white on the left and blue on the right
4.7 TRANSDUCER SETUP
This menu allows you to calibrate the speed through the water, water temperature and the
keel/prop offset of the transducer.
Figure 4.7 - Transducer Setup sub-menu
Keel Offset : The keel offset can be set as to cause the Fish Finder to report either the
depth below the keel or the actual water depth from the surface. If we want the Fish Finder
to report the depth below the keel, we have to enter a negative value meaning the
transducer is mounted above the keel. So if, the range scale is set to e.g. 20 feet, the
actual depth below the transducer is 15 feet and a KEEL OFFSET of -3 feet is entered,
then the digital depth shall report 12 feet because that is the depth below the keel
and the scale on the graphic image shall change so that the range shown is
not 0 to 20 feet but -3 to 17 feet. If we want the Fish Finder to report the actual water depth
from the surface, we have to enter a positive value meaning the transducer is mounted
below the surface. Assume that the transducer is mounted say 5 feet below the
water line and we want the unit to report the water depth from the surface,