Raymarine L470 instruction manual Bottom of display, Operating Instructions

	From the System Setup Menu, you can turn this item off
	or change the units used for this display.
Fish symbol	This indicates that the FishFinder sees a fish. Generally,
	the larger the fish symbol appears, the larger the fish. (The
	size of the fish symbol actually depends on a number of
	factors. See the section on “Fish Indications.”)
	If the fish is detected using the narrow 200 kHz beam, the
	display will show a filled-in symbol. If the fish is detected by
	the wide 50 kHz beam, the display will use a hollow symbol.
	(For more on this, see “Choosing the Frequency.”)
Fish depth	This indicates the depth of the fish shown by the fish
	symbol. This number will be shown using the same depth
	units (feet, fathoms, or meters) you have selected on the
	System Setup Menu. The fish depth indicator is turned off
	when the fish symbol function is off.

Bottom of display

Bottom indication

This shows the bottom of the lake or sea. You can compare this to the range depth shown in the lower right-hand corner. (In this example, the checkered pattern shows the unit is getting a strong echo return from the bottom. See the information on the White Line feature in the Setup Instructions.)

Range	The “range” is the maximum depth the unit is set to
	measure. In this example, this is 100 feet. You can set the
	range manually, or the FishFinder can do it automatically.

Bottom depth This is the depth of the bottom shown on the display. You can select FT (feet), FA (fathoms), or M (meters) using the System Setup Menu. If the FishFinder can’t tell how deep the water is, the last known depth flashes on the display.

This will continue until the unit can see the bottom again.

Before we explain the other pages, there are some general things you should know about the operation of the FishFinder.

36 Operating Instructions