LT-3100S GMDSS User & Installation Manual Rev. 1.02
Using the system
Lars Thrane A/S
www.thrane.eu
Page 47 of 71
Alert acknowledgement
Alerts of priority warning must be acknowledged by the user. When an alert is both acknowledged and
rectified it disappears from the alert list. Cautions cannot be acknowledged and thus disappear as soon as
they are rectified.
When an alert cannot be acknowledged by the user, it is indicated with
the “acknowledge not allowed”
icon (see Table 19). This applies to alerts that require additional information than the default alert text and
alert description that comes with all alerts. This is e.g. the case for the
“Distress Rx”
alert (see <reference>),
where the user must read the received Distress Alert Relay message(s) to implicit both acknowledge and
rectify the alert.
NOTE
:
The LT-3100S GMDSS system currently does not define any alerts that can be explicit
acknowledged by the user.
Aggregation
The BAM concept defines aggregation as a means for an alert source to combine multiple individual alerts
of the same kind into a single aggregated header alert in order to help reduce the risk that the number of
individual alerts obscures the display of equally important additional alerts, for example due to the active
alert list length exceeding the maximum display capability of the alert source UI.
NOTE
:
The LT-3100S GMDSS system currently does not define any alerts that can be aggregated.
Responsibility transfer
The BAM concept defines the Central Alert Management (CAM) system as equipment used for centralizing
management, handling and presentation of alerts on the bridge. A CAM system may be standalone or
combined with other equipment, for example in the case of an Integrated Navigation System (INS).
A CAM system connects to multiple alert sources (such as the LT-3100S GMDSS system) in order to manage
and present their alerts on the CAM UI. An alert will thus be presented in the alert list of both the alert
source and the CAM system.
In order to avoid the bridge team having to acknowledge alerts at the individual alert source, the CAM
system may perform a
responsibility transfer
of an alert from the alert source to the CAM system. When an
alert has had its responsibility transferred to the CAM system, it can be acknowledged at the CAM system
and its corresponding audible signal will only be heard at the CAM system.
Icon
Description
Acknowledge not allowed
Table 19: BAM acknowledge not allowed
