Raymarine L470 instruction manual FishFinder Page, Operating Instructions, Shallow alarm set

FishFinder Page

Fish alarm set

Shallow alarm set

Deep alarm set

Buzzer symbol

Auto

features on

Speed

Log/distance

Water

temperature

Bottom

indication

Bottom depth

Auto range on Auto sensitivity on Auto zoom on

Fish symbol on

Auto frequency on Transducer frequency

Boat symbol

Water surface

Depth markers

Fish depth

Fish symbol

Range

Fig. 3-4

FishFinder

Page

Figure 3-4 shows a typical FishFinder display. (The FishFinder Page is also called the “chart” or “bottom graph” display.) As time passes, this display scrolls from right to left. The scrolling image becomes a record of the echoes and the bottom seen by the FishFinder as your boat moves.

The images at the right side of the display show the most recent echoes. Some of these echoes indicate fish, and others show the bottom. As new echoes are received, the FishFinder “draws” a graph of the bottom. The bottom graph helps you to tell whether the bottom is rising or falling. It also allows you to identify the shape or “structure” of the bottom. This can indicate a reef or shipwreck.

Notice that the scrolling speed of the display does not necessarily match the speed of the boat. The scrolling speed of the display is called the

32 Operating Instructions