NorthStar Navigation EXPLORER 657 Sonar fishfinding Displays, Sonar history display no split

9 Sonar fishfinding: Displays

To show the Sonar display, press , then select Sonar.

There are five kinds of sonar display. To use a

display, press , select Sonar splits, then select the type of display to use:

No split: Sonar history display at a single or mixed frequency (see section 9-1).

Split zoom: Sonar history plus a zoomed section (see section 9-2).

Full screen zoom: See section 9-2.

Split bottom: Sonar history plus a bottom trace in a zoomed section (see section 9-3).

Split 50/200: Sonar histories at 50 and 200 kHz (see section 9-4).

Split A-Scope: Sonar history plus echo strength (see section 9-5).

If the display is split, adjust the split ratio if required:

1Press and select Sonar display split.

2 Press or to adjust the ratio.

3 Press .

9-1 Sonar history display - no split

A

B

C

G

F

A Optional data header (see section 2-7-3) B Depth

C Color bar

D Bottom

E Range

F Fish symbols with depth

G Depth line

The window scrolls from right (most recent echoes) to left (oldest echoes).

D

E

40 Northstar Explorer 657 Installation and Operation Manual