This message shall be sent from shore only, to inform about the about the minimum vertical clearance of a certain bridge opening. The information shall be displayed on an external display such as Inland ECDIS.
RIS-VTT
Parameter | Bit | Description | |
---|---|---|---|
Message ID | 6 | Identifier for Message 8; always 8 | |
Repeat Indicator | 2 | Used by the repeater to indicate how many times a message has been repeated. Default = 0; 3 = do not repeat any more |
|
Source ID | 30 | MMSI number | |
Spare | 2 | not used, should be set to zero (reserved for future use) | |
Binary data | Application Identifier | 16 | DAC = 200, FI = 25 |
Version indicator | 3 | The version number of the message default = 0, rest for future use | |
UN country code | 12 | 2*6 Bit characters | |
Fairway section number | 17 | bit coded numerical value 1-99999, 0=unknown, rest not used | |
Object code | 30 | 5*6 Bit characters | |
Fairway hectometre | 17 | bit coded numerical value 1-99999, 0=unknown, rest not used | |
Bridge Clearance | 14 | from water surface to lowest point of the bridge in the fairway [in cm] bit coded numerical value 1-9999, 0=unknown, rest not used |
|
Time to the last measurement [min] | 10 | age of bridge clearance value in minutes bit coded numerical value 0-720, 721=older than 12 hours, 722=unknown, rest not used |
|
Accuracy | 5 | bit coded numerical value indicating the accuracy of the bridge clearance 0=unknown, 1-30 = accuracy (+/-) in cm is better than the given value, 31=accuracy worse than +/- 30cm | |
Spare | 4 | not used. Should be set to zero | |
Total | 168 | occupies 1 slot |