Chapter 4 Operation Method
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4.3 Checking the Alerts and Information
OPU displays two types of notifications.
- Alert: Abnormal situations and conditions, defined in IEC62923.
- Information: Situations and conditions that are not alerts but need checking.
4.3.1 Definition of alerts
In IEC62923, priority and category of alerts are defined as shown in Table 4-3 and Table 4-4.
Table 4-3 Alert priority defined in IEC62923
Priority Description Indication
Emergency
alarm
alarm which indicates immediate danger to human life or
to the ship and its machinery exists and requires
immediate action
Visual presentation
and audible signal
Alarm condition requiring immediate attention and action by the
bridge team, to maintain the safe navigation and safe
operation of the ship
Visual presentation
and audible signal
Warning condition requiring immediate attention, but no immediate
action by the bridge team
Visual presentation
and audible signal
Caution awareness of a condition which does not warrant an
alarm or warning condition, but still requires attention out
of the ordinary consideration of the situation or of given
information
Visual presentation
only, no audible
signal
Table 4-4 Alert category defined in IEC62923
Category Description
A alert for which graphical information at the task station directly assigned to the
function generating the alert is necessary, as decision support for the evaluation
of the alert related condition
B alert where no additional information for decision support is necessary besides
the information which can be presented at the central alert management HMI
C alert that cannot be acknowledged on the bridge but for which information is
required about the status and treatment of the alert
[NOTE]
According to the definition in IEC62923, all alerts of this equipment are assigned to priority
“Caution” and category “B”. When new alert occurs, according to the definition of caution alert,
that alert is displayed automatically on the OPU but no audible signal occurs.
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