Standard Horizon Ff520 owner manual Transducer Setup, Keel Offset

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,

FF520

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