22.1 All alerts should be displayed on the central
alert management HMI.
22.2 The central alert management HMI should
offer the possibility to display category A alerts as “aggregated
alerts”, i.e., a single visual indication indicates the existence
of many alerts on the task station presenting the function, e.g.
one alert should indicate the existence of multiple dangerous target
alerts existing at the task station for collision avoidance.
22.3 The central alert management HMI should provide
the means to announce and indicate alerts to draw the attention of
the bridge team.
22.4 The central alert management HMI should
have the capability to substitute the audible alert announcement
of the individual equipment, except for category A alerts.
22.5 The central alert management HMI should
allow to identify alerts, and enable the immediate identification
of the alert releasing function or sensor/source.
22.6 The central alert management HMI should be
designed that alert messages of the different priorities are clearly
distinguishable from each other.
22.7 The alert messages should be completed
with aids for decision making, as far as practicable. An
explanation or justification of an alert should be available on request.
22.8 The central alert management HMI should enable
an immediate acknowledgement of the alarms and warnings by a single
operator action, except for category A.
22.9 The central alert management HMI should
be able to display at least 20 recent incidents/faults at
the same time.
22.10 If the central alert management HMI is such
that it can not contain all active messages requiring the bridge
teams attention, then there should be a clear and unambiguous
indication that there are additional active messages requiring attention.
22.11 It should be possible to display the additional
active messages by a single operator action.
22.12 It should be possible to return to
the display containing the highest priority alerts by a single
operator action.
22.13 Silencing of audible alerts
22.13.1 It should be possible to temporarily silence
all audible alerts at the central alert management HMI.
22.13.2 The audible signal should be reactivated,
if the alert has not been acknowledged within the specified times
in paragraph 20 for alarms and warnings.
22.14 Category B Alert history list
22.14.1 An operator accessible alert history
list should be provided by the central alert management HMI.
22.14.2 When a category B alert is no longer active
the message should be kept with its entire content in an alert
history list, with the date and time the alert was raised,
acknowledged and rectified.
22.14.3 The messages of the alert history list
should be displayed in chronological order.
22.14.4 Access to the alert history list and return
to the active alert display should be possible by a simple operator
action.
22.14.5 The system should provide a clear and
unambiguous indication when the alert history list is being accessed
and displayed.
22.14.6 The system should revert automatically
to the active alert display when it detects a new alert condition.
22.14.7 The central alert management HMI
should support the search and identification of alerts in the
alert history list.
22.14.8 It should be possible to keep the content
of the alert history list at least for 24 h.