Argus Radar - SERIAL INTERFACE SPECIFICATIONS
988-10187-004 2.36
NOTE 1
The first field specifies the total number of sentences used for a message,
minimum value 1. The second field identifies the order of this sentence in the
message, minimum value 1. These cannot be null fields. When the sentence
number is 2, the following Alert category, Alert priority and Alert state can be
null fields.
NOTE 2
The sequential message identifier relates all sentences that belong to a
group of multiple sentences (i.e. message). Multiple sentences (see Note 1)
with the same sequential message identifier, make up one message.
NOTE 3
Time should represent the last time the data within the alert message has
changed. For example changing the alert text by in-/decrementing a
contained counter or count down should cause a revision of alert message
and a new time. Time is an optional field. The time-field is additional
information about when this happened and not used for decision making.
There is no mandatory requirement for time synchronization between the
equipment. It should be either a null field (if not used) or UTC (if used).
Sender is allowed to use all alternatives defined in IEC 61162-1:2010, Table
5, Field type summary. The receiver is allowed to ignore the content of this
field. If the receiver does not ignore this field, it should support all
alternatives defined in IEC 61162-1:2010, Table 5, Field type summary.
NOTE 4
The alert category is in compliance with the category definition as described
in INS Performance Standard (MSC.252(83)) and Bridge Alert Management
Performance Standard (MSC.302(87)):
A, Category A: Alerts, where information at the operator unit is directly
assigned to the function generating the alert is necessary, as decision
support for the evaluation of the alert-related condition, e.g. graphical
information of danger of collision or graphical information of danger of
grounding.
B, Category B: Alerts where no additional information for decision support is
necessary besides the information which can be presented using the alert
source and the text description of the alert.
C, Category C: Alerts that cannot be acknowledged on the bridge but for
which information is required about the status and treatment of the alerts,
e.g. certain alerts from the engine.
NOTE 5
Alert priority:
Emergency Alarm: E, for use with Bridge Alert Management, (see IMO
MSC.302(87))
Alarm: A
Warning: W
Caution: C
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