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Northstar M121/M84 Installation and Operation Manual82
Plotting Interval
Select the plotting and recording interval. The
options are Distance or Time.
Distance
Select the distance plotting interval: 0.01, 0.05,
0.1, 0.5, 1.0, 2.0, 5.0 or 10.0 distance units.
Time
Select the time plotting interval: 1, 5, 10 or 30
seconds or 1 minute.
Memory used
The percentage of memory used in the track
being recorded.
Tip: Use the user card window to check the
number of points recorded in each track
(see section 15).
Send track
This option is included for compatibility with
older units. For information, see your Northstar
dealer.
Delete track
The data in the track selected for Record (see
above) is deleted.
19-8 Setup > AIS
Note: This feature requires an AIS receiver.
There are multiple methods to filter AIS vessels
that are displayed onto the charts.
Filter by Type
Vessel types that are not selected will be filtered
off the chart. Default is set to all types enabled
allowing all vessels to be displayed on the chart.
Filter by distance
Vessels outside the radius selected from our
current position are filtered off the chart. Default
value is set to 300 nm allowing all vessels to be
displayed on the chart within that distance.
Filter by speed
Vessels with speed below the value selected
are filtered off the charts. Default is set to 0 nm
allowing all vessels to be displayed onto the
chart.
Show Dangerous Only
Show only vessels that have a TCPA/CPA below
the trigger values. This filter will override any
other filter option.
Dangerous Vessel Alarm
When enabled an alarm will activate when
both the TCPA and CPA are less than the trigger
values.
Note: Even when this setting is disabled the
dangerous vessels will still be indicated on the
chart.
TCPA Limit
Set the Time of Closet Point of Approach limit.
CPA Limit
Set the Closet Point of Approach limit.