Operation Manual

8120 Installation and Operation Manual39
Fun symbol + depth
Normal fish symbolFun fish symbol
9-5 Range
Range is the vertical depth displayed on the
Instrument sonar window. For example, if the
range is 100 m, then the sonar window shows
depths between 0 and 100 m. The range is
displayed at the bottom, right corner of a
sonar window.
The Instrument has two range modes:
Auto: The Instrument adjusts the range
automatically so that the bottom of the
water is always shown at the bottom of
the window. Auto range is recommended
for normal operation.
To set Auto mode:
1 Go to a sonar window (see section 9).
2 Press
GOTO
AUTO
Manual: The Instrument does not adjust
the range automatically. If the bottom
depth is below the range, the bottom will
not appear on the window. Manual range
is useful if the bottom depth changes
rapidly, because Auto range will cause the
window to change range frequently.
To set Manual range or to change the
range:
1 Go to a sonar window (see section 9).
2 Either press
to increase range or
press
to decrease range
• It is difficult to get fish arches in shallow
water as the transducer sonar beam is
very narrow near the surface and fish do
not stay within the beam long enough
to display an arch. Several fish in shallow
water tend to display as randomly stacked
areas of colour.
• Wave motion may result in distorted fish
arches.
CAUTION
!
!
CAUTION
DANGER
WARNING
Use the Auto range when learning to use
the Instrument or when travelling at speed.
Zoom range and offset
The sonar Zoom and Bottom windows can
show a magnified part of the range (see
sections 9-2 and 9-3).
Fish arch + depth
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