Northstar
FISH 457/467
Installation and Operation Manual
23
3-5 Range
Range is the vertical depth displayed on the
457/467 sonar display. For example, if the range
is 100 ft, then the sonar display shows depths
between 0 and 100 ft. The range is displayed at
the bottom, right corner of a sonar display.
The 457/467 has two range modes:
Auto:
The 457/467 adjusts the range
automatically so that the bottom of the water
is always shown at the bottom of the display.
Auto range is recommended for normal
operation.
To set Auto mode:
1
Go to a sonar display (see section 4).
2 Press
, select
Range
and select
Auto
.
Tip
: To quickly enlarge from manual to
autorange hold down the + or - key for 1.5
seconds
Manual
: The 457/467 does not adjust the
range automatically. If the bottom depth is
below the range, the bottom will not appear
on the display. Manual range is useful if the
bottom depth changes rapidly, because Auto
range will cause the display to change range
frequently.
To set Manual range or to change the range:
1
Go to a sonar display (see section 4).
2 Either
press to increase range or
press
to decrease range
Zoom range and offset
The sonar Zoom and Bottom displays can show
a magnified part of the range (see sections 4-2
and 4-3).
!
WARNING
Use the Auto range when learning to use the
457/467 or when travelling at speed.
•
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 color.
•
Wave motion may result in distorted fish
arches.
