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Control Message

Introduction/Additional information: 

Introduction:

The Control message shall be sent from by the competent authority from shore only to allow or forbid the broadcasting of ASMs by vessels navigating on  territories under their jurisdiction.

Additional Information / usage notes:

  • Each ASM from ship in this inventory has a default “on” or “off” value. This value regulates whether that message shall be broadcasted or not prior to the reception of an applicable Control Message.

  • The responsibility for initiating/withholding the broadcasting of an ASM from ship is at the external application (e.g. Inland ECDIS). ASM which are implemented in the Inland AIS station cannot be controlled by this message.

  • Each Control Message can control one specific ASM (DAC+FI). If more than on ASM has to be controlled, multiple Control Messages are needed.

  • A Control Message can only control the ASM behaviour for one country, given by the UN country code.

  • A Control Message can optionally be geographically limited to a certain river (fairway section code) or a specific fairway section, defined by start and end river-kilometre.

  • The competent authority has to define the timeout value for the Control Message. By setting the timeout value to 0 the message will never time out. That means the value is stored and will only be changed if a contrary Control Message is received.

  • The Control message can set or change the reporting rate of the controlled ASM. The reporting rate defined in the Control Message precedes any default setting given in this inventory document

  • The Control Message does not apply for responses to the Interrogation on specific IFM (IFM2) and not for responses to the Inland Capability Interrogation (DAC200/FM 3)

Permitted as from: 
01/12/2017
Registrant: 
EU
Physical link: 
AIS
Message number (0=VDES-VDE): 
8
DAC or VPFI: 
200
FI / Message ID: 
1
Version: 
0
Technical point of contact: 

RIS-VTT

State: 
in force
Number of slots (max): 
1
Last modified: 
29/01/2021 - 23:18
Details: 
 ParameterBitDescription
 Message ID6Identifier for Message 8; always 8
 Repeat Indicator2Used by the repeater to indicate how many times a message has been repeated.
Default = 0; 3 = do not repeat any more
 Source ID30MMSI number
 Spare2not used, should be set to zero (reserved for future use)
Binary dataApplication Identifier16DAC = 200, FI = 1
Version indicator3The version number of the message default = 0, rest for future use
UN country code122*6 Bit characters
UN Country code of applicable country
Fairway section number17Bit coded numerical value, 1-99999,
0 = not applicable, to which control message it is applicable
Fairway kilometre Start12Start kilometre of the fairway section where the control message applies
bit coded numerical value, 0-4000,
4095 = the whole fairway section, rest not used
Fairway kilometre End12End kilometre of the fairway section where the control message applies
bit coded numerical value, 0-4000,
4095 = the whole fairway section, rest not used
Application Identifier of controlled ASM16DAC and FI of the shipborne ASM to be controlled
DAC = 200, FI = XXX
Timeout Value11Timeout of the Control Message in minutes
bit coded numerical value,
0 = forever until disabled message has been received,
1-2047 timeout in minutes, default = 120
Reporting Interval8Reporting interval of the controlled ASM in minutes
Bit coded numerical value,
0 = default = default value specified for the controlled ASM,
1-255 reporting interval
Enable-Disable10 = Disable message, default
1 = Enable message
Spare20not used. Should be set to zero
 Total168occupies 1 slot