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Northstar Explorer D310 Installation and Operation Manual
6
Water surface
Depth of transducer
Negative value
Transducer
Note: The boat illustrated uses a through hull transducer
Positive value
Keel offset
Keel offset
3 Depth, keel offset, too deep alarm, too shallow alarm
3-1 Set depth units
The units can be METERS, FEET or FATH:
Press ; if necessary, press again.
3-2 Set too deep alarm
The too deep alarm sounds if the alarm is turned on
and the depth becomes equal to or more than the
too deep alarm depth. To mute the alarm, press
.
To set the too deep alarm:
1 Hold
for two seconds to display the Too
Deep Alarm screen:
Deep
alarm
value
Alarm
is on
2 To change the alarm depth, press or .
3 To turn the alarm on or off, press
.
4 Press .
3-3 Set too shallow alarm
The too shallow alarm sounds if the alarm is turned
on and the depth becomes equal to or less than the
too shallow alarm depth. To mute the alarm, press
. To set the too shallow alarm:
1 At the Too Deep Alarm screen, hold for
two seconds to display the Too Shallow Alarm
screen:
Shallow
alarm
value
Alarm
is off
2 To change the alarm depth, press or .
3 To turn the alarm on or off, press .
4 Press .
Depth and keel offset
The displayed depth is the distance from the
transducer on the boat to the bottom of the water,
plus or minus an offset which is called the keel
offset:
A positive keel offset displays depth as
measured from a point above the transducer.
For example, if you set the offset to the distance
from the transducer to the surface, it will display
the depth from the surface to the bottom of
the water.
A negative keel offset displays depth as
measured from a point below the transducer.
For example, if you set the offset to minus the
distance from the transducer to the bottom
of the keel, it will display the depth from the
bottom of the keel to the bottom of the water.