Raymarine L470 instruction manual Operating Instructions

the selected range, then Bottom Lock will not display the bottom image.

Bottom Lock

Range The range for the Bottom Lock image is set independently from the master range setting for the FishFinder. This “Bottom Lock Range” is measured up from the bottom, rather than down from the surface. The Bottom Lock Range may be adjusted using the Setup Menu when the Bottom Lock feature is enabled. (See page 73). The current setting for the Bottom Lock Range is shown in the upper right corner of the Bottom Lock image. This number is the maximum distance above the bottom the unit will display on the Bottom Lock image. (If the Bottom Lock Range number is larger than the actual depth of the water, the unit will not show any target in water shallower than the transducer itself.)

The Bottom Lock feature may be used with a split screen presentation or in a full-screen presentation. You can make a selection from the Setup menu. See page 74 for details.

Operating Instructions 55