Furuno FELCOM 15 - AP1.2.4 Distress Alert

AP1.2 Message & Signal Transfer
AP1-16
AP1.2.4 Distress Alert
Fig. AP1.2.5 Distress Alert flow
MES LES NCS
NCS CC
(LES network data)
CES TDM
ISL
Tunes to NCS CC
Decodes BB
Tunes to SES
Signalling
Channel
Tunes to CES TDM
Tunes to CES TDM
Records MES distress alerted
(
MES logged-in)
SES Signalling Channel
(DISTRESS ALERT)
(DISTRESS ALERT ACK)
(DISTRESS ALERT)
(DISTRESS ALERT ACK)
Permanently assigned TDM
Channel
Demand Assigned TDM
Channel
(DISTRESS ALERT)
NCS CC
(DISTRESS ALERT ACK)
ISL
(DISTRESS)
(DISTRESS ALERT ACK)
Records MES distress alerted
(
MES logged-out)
SES Signalling Channel
(DISTRESS ALERT)
NCS CC
(DISTRESS ALERT ACK)
Enforces a log-in for MES
sending distress alert.
SES Signalling Channel
(Continuous transmission on
defined frequency)
(assigned temporarily on a
demand basis)