Distress Alert - Furuno FELCOM 12 Service Manual

5. Distress Alert

( MES logged-in)
Tunes to NCS CC
Decodes BB
Tunes to CES TDM
Tunes to SES
Signalling
Channel
Tunes to CES TDM
( MES logged-out)
Note) NCS Common channel includes the LES information, so the LES which receives
the distress alert is automatically selected.
MES
NCS CC
(LES network data)
Permanently assigned TDM
Channel
SES Signalling Channel
(DISTRESS ALERT)
CES TDM
(DISTRESS ALERT ACK)
Demand Assigned TDM
Channel
SES Signalling Channel
(DISTRESS ALERT)
NCS CC
(DISTRESS ALERT ACK)
SES Signalling Channel
(DISTRESS ALERT)
NCS CC
(DISTRESS ALERT ACK)
1-15
LES NCS
(Continuous transmission on
defined frequency)
ISL
(DISTRESS ALERT)
(DISTRESS ALERT ACK)
(assigned temporarily on a
demand basis)
ISL
(DISTRESS)
(DISTRESS ALERT ACK)
Records MES distress alerted
Records MES distress alerted
Enforces a log-in for MES
sending distress alert.