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APPENDIX II: MESSAGE TYPE INDICATORS
NAVTEX broadcasts use following message type letter:
A Navigational warnings
B Meteorological warnings
C Ice reports
D Search and rescue information, and pirate warnings
E Meteorological forecasts
F Pilot service messages
G DECCA messages
H LORAN messages
I OMEGA messages (Note: OMEGA has been discontinued)
J SATNAV messages (i.e. GPS or GLONASS)
L Navigational warnings - additional to letter A
V Notice to Fishermen (U.S. only)
W Environmental (U.S. only)
X Special services - allocation by IMO NAVTEX Panel
Y Special services - allocation by IMO NAVTEX Panel
Z No message on hand