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Northstar M121/M84 Installation and Operation Manual 87
Press
MENU
twice, then select Time:
Local offset
The difference between local time and UTC
(GMT). Change local offset when daylight
saving time starts and ends. The range is 0 to ±
13 hours, in 30 minute steps.
Temperature filter
Water turbulence and currents cause the water
temperature to fluctuate slightly. To give stable
readings, the Instrument calculates these values
by taking several measurements and averaging
them. Set the Temperature filter to the lowest
value which gives stable readings. The range is
1 to 30 seconds or Off (0).
Keel Offset
A depth transducer measures depths below
where the transducer is mounted on the boat,
usually the bottom of the boat. The Instrument
calculates the depths to display by adding the
keel offset to all measured depths.
A Have a zero keel offset to display depths
below the transducer.
B Enter a positive keel offset to increase the
displayed depth. For example to display the
total depths below the surface, enter the
depth of the transducer below the surface.
C Enter a negative keel offset to decrease the
displayed depth. For example, to display the
depths of clear water below the boat, enter
minus the depth of the deepest part of the
boat below the transducer.
Transducer; depths
measured below
here
Depths
measured
below here
Depths measured
below here
Speed range
The maximum reading to display on an analog
boat speed gauge (see section 11). Choose a
range suitable for your boat.
Fuel
See section 13-7, Calibrate.
19-14 Setup > Time
1 Select Local offset.
2 Press
or to change the offset, then
press
ENTER
.
Time format
The options are 24 hour or 12 hour.
Date format
The options are dd/MMM/yy, MMM/dd/yy,
dd/MM/yy or MM/dd/yy.
A
B
C