Furuno FM-8900S handleiding
Handleiding
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3. DSC DISTRESS OPERATIONS
3-15
3.6 How to Handle Messages From the MOB Device
The system can receive DSC distress messages from the MOB device attached to life-
jackets. The device outputs a distress message in two modes, based on acknowl-
edged status. The methods and escalation are listed in the table below.
Note 1: A group MMSI must be registered in order to receive DISTRESS RELAY
GROUP messages (see section 5.13.2).
Note 2: Vessels with AIS systems show the MOB device with coordinates.
Note 3: The MOB device operation varies depending on the manufacturer. Refer to
your MOB device manual for operational instructions.
Note 4: Depending on the MOB device, the initial distress message transmission
mode may be either CLOSED or OPEN.
The MOB device transmits the DSC DISTRESS RELAY message in the CLOSED
mode at five minute intervals, three times. Vessels receiving this message should ac-
knowledge as soon as possible and organize rescue operations.
Note: DSC acknowledgment messages should only be sent when the Master or per-
son in charge of the recovery vessel considers it prudent to do so.
If the DISTRESS RELAY message is not acknowledged within 12 minutes from the
initial message transmission, the DSC message is escalated to DISTRESS ALERT
and the output mode changes to OPEN.
At this point, the DISTRESS ALERT message is transmitted at five minute intervals
again, three times. Vessels receiving this message should acknowledge as soon as
possible and organize rescue operations.
Note: DSC acknowledgments to open loop MOB device alerts are normally only sent
by coast stations, or under direction of a coast station. However, the recovery vessel
may send a DSC acknowledgment message if the person in the water has been re-
covered.
If the DISTRESS ALERT message is not acknowledged within 30 minutes of the initial
message transmission, the device switches to battery-saving mode. Battery-saving
mode transmits the DISTRESS ALERT message at 10 minute intervals, comprised of
5 minutes monitor mode and 5 minutes sleep mode.
The alert cannot be acknowledged if the device is in sleep mode.
The following figures provide a graphic representation of the cycles described above.
Mode Alert Priority Escalation
CLOSED (Transmitted to Own
Ship and consort vessels)
DISTRESS RELAY If unacknowledged, escalat-
ed to OPEN mode and DIS-
TRESS ALERT level.
OPEN (Transmitted to all ves-
sels and coastal stations)
DISTRESS ALERT None
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Productinformatie
| Merk | Furuno |
| Model | FM-8900S |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 18955 MB |
