Metreorological and hydrological data

Introduction/Additional information: 
This message allows the distribution of meteorological and hydrological information. Should there be no positional information or time of measurement, this message should not be transmitted. If there is no data available, default value to be transmitted is the highest available binary value for that particular data field. It is to be displayed as ‘not available’
(not 9999 or zero or similar). This message takes 2 slots. Not all the information specified in the tables will be available at all stations. The interval between the broadcasting of this message should not exceed 12 minutes. Attribute of message: broadcast, shore station transmitting, no acknowledgement required.
Permitted as from: 
16/05/2004
Not to be used after: 
01/01/2013
Registrant: 
IMO Circ. 236
Message number: 
8
DAC: 
1
FI: 
11
State: 
deprecated
Number of slots (max): 
2