Furuno NX-700B Service Manual page 19

In the NAVTEX system, stations allocation on the NAVAREA are divided into four
groups (A-F, G-L, M-R and S-X). Each group has a capacity for broadcasting six times
a day (every four hours) and at intervals of 10 minutes.
Header code
ZCZC: Start code
B3, B4: Message No. (00: Urgency Message, 01 to 99: Normal Message)
Message ID
A=Navigational warnings
B=Meteorological warnings
C=Ice reports
D=Search and Rescue information, and pirate attack warnings
E= Meteorological forecasts
F=Pilot service messages
G=AIS
H=LORAN messages
I=Spare
J=SATNAV messages
K=Other electronic navaid messages
L=Navigational warnings – Additional to letter A
V toY=Special service allocation by the NAVTEX Co-ordinating Panel
Z=No messages on hand
Note:
A user cannot reject receiving messages A, B, D and L by editing: User select Msg.
Fig. 1.2.2 Allocation of NAVTEX stations
B1: Station ID
1-5
B2: Message ID
1.2 Operation Guide