30. Alarms
30-2
30.2 Alarms Generated by Navigation Calculation
Navigation calculation generates the following alarms:
• Error detected in any sensor
• Radar communication error
• Software alarms, etc.
30.3 Alarms Generated by Chart Calculation
Chart calculation generates the following alarms:
• New pilot data notebook page available
• Chart alarms based on S57 charts
• Chart alarms based on user chart’s dangerous symbols, lines and areas
30.4 Alarms Generated by Steering Calculation
Note that all steering-related functions are available only if the ECDIS processor is also connected to the optional
Trackpilot processor. Some of the alarms such as Outside Channel limit are also available without the optional
Trackpilot processor. Without the Trackpilot processor, all alarms generated by steering calculation appear in the
same alarm queue as alarms generated by navigation calculation.
30.5 Alarms Generated by Radar Overlay
Alarms generated by Navigation Calculation, Chart Calculation and Steering calculation are common for each
workstation (i.e. they can be seen on each workstation’s alarm queue with same alarm number). Alarms generated
by Radar overlay are generated locally on workstation where failure happens (i.e. they can only be seen on
workstation where it happens). Each workstation has own alarm numbers for alarms generated by radar overlay.
Alarm range is Alarm 6x00 - Alarm 6x11, x indicates ECDIS workstation number 1-4.
It is possible to view alarm queue of ECDIS system on Conning display. Window on Conning Display is called
Alarm message window, where all active or pending alarms of system are shown in priority order. If in the system
there are more than one ECDIS workstation and more than one Radar overlay installed, to distinguish which Radar
overlay is source of alarm they have own set of alarm in use.
For example: “6100 RadOv No Headline” for 1st workstation
“6200 RadOv No Headline” for 2nd workstation
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