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1. OPERATIONAL OVERVIEW
1-6
1.5.3 Zoom displays
The “single-frequency picture” (high or low frequency) appears on the right half
of the screen and the zoom picture on the left half. The zoom picture may be
pre-chosen among bottom lock, bottom zoom, marker zoom and discrimination,
from the SYSTEM SETTING menu. For further details, see ZOOM MODE on
page 3-3.
Bottom-lock display
The bottom-lock display shows the area between the zoom marker and the
bottom as a straight line to distinguish it from fish near the bottom, and thus it is
useful for discriminating fish near the bottom.
The bottom-lock zoom range may be chosen on the RANGE SETTING menu.
For further details see B/L RANGE on page 3-5.
Zoomed fish school
Bottom-lock display
Bottom shown
as a straight line
Single-frequency display
Zoom marker
This area zoomed
and displayed on
left 1/2 of screen
21.7
LF
1/1
0
0
40
10
20
30
0
1
2
3
4
5
Fish
school
m
0.0
Bottom-lock display