Icom MR-1220 Series, Instruction Manual

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AIS RECEIVER
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AIS settings
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AIS menu
You can customize the settings in the AIS menu.
[MENU]/[ ] > AIS
Display AIS Targets
Sets whether or not to display AIS symbols when the
radar is in transmitting (TX) mode.
L
Regardless of this setting, AIS information is displayed
when an AIS target reaches the CPA and TCPA limits.
Display Tracks
Sets whether or not to display the tracks of up to 5
dots for each AIS symbol. You can set the interval of
the track in “Track interval” in the Target menu.
[MENU]/[ ] > Target > Track interval
Display Target's Name
Sets whether or not to display the names of targets.
OFF: Does not display the Target name.
Selected: Displays only the name of the selected
target.
Active Targets: Displays all the name of active targets.
Auto Activate Function
Sets whether or not to automatically activate a
sleeping AIS target when the target comes into
the specified area. You can specify the area in the
“Distance (Auto Activate)” and “Angle (Auto Activate)”
settings.
Distance (Auto Activate)
Sets the maximum range for the Auto Active function
by distance.
Range: 0.1 ~ 10.0 (NM), 0.2 ~ 18.5 (km), or 0.1 ~ 11.5
(SM).
L
The distance unit varies, depending on the “Unit
(Distance)” setting in the Initial menu.
Angle (Auto Activate)
Sets the maximum range for the Auto active function
by angle.
Range: 5° ~ 180° in 5° steps
New Target Warn (Auto Activate)
Sets whether or not to alert you when an AIS target
has automatically been activated.
Display Range
Sets the range for displaying the AIS targets.
• ∞: All range from your vessel.
• 0.1 ~ 36.0 (NM), 0.2 ~ 66.7 (km), or 0.1 ~ 41.4 (SM):
Sets the distance from your vessel by 0.1 steps.
Maximum Targets
Sets the maximum number of AIS targets that radar
displays to between 10 and 100.
Slow Warn Function
Selects whether or not to use the Slow Warn function.
Since AIS units cannot rely on COG (Course Over
Ground) data for vessels that are anchored or drifting,
CPA (Closest Point) and TCPA (Time to CPA) may
not be calculated correctly. If a vessel stays in your
alarm zone, the collision warning may sound multiple
times with unreliable data, even if there is no actual
danger. To prevent this, if the SOG (ground speed) of
the vessel is lower than this setting, the Slow Warn
function considers as the vessel's COG is fixed toward
your vessel.
Speed (Slow Warn)
Sets the range of the target vessel’s speed in 0.1
steps to activate the Slow Warn function.
Range: 0.1 ~ 5.0 (kn), 0.2 ~ 9.3 (km/h), or 0.1 ~ 5.8
(mph).
Clear Lost Targets
Clears all of the Lost Targets.
Select <OK> and Push [ENTER]/[ ] to clear the
Lost targets.
Display Safety Message
Sets whether or not to display a message when it is
received.
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Related settings
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Target menu
You can change the target settings for AIS operation.
The settings of the Target menu are commonly used
for the ARPA and AIS operations. See page 39 for
the
Target menu details.
These are the Target menu items and their default
settings.
• Vector Mode: True
• Vector Time: 6 min
• Track Interval: 1 min
• CPA Limit: 1.0 NM
• TCPA Limit: 1 min
• CPA/TCPA Alarm: ON
L
CPA (Closest Point of Approach) and TCPA (Time
to Closest Point of Approach) limits are set to give a
warning when a target or targets enter those limits
around your own vessel.