Water level message

Introduction/Additional information:

Introduction:

This message should be used to inform skippers about actual water levels in their area. It is additional short term information to the water levels distributed via Notices to Skippers. The update rate shall be defined by the competent authority. It is possible to transmit the water levels of more than 4 gauges using multiple messages.

Additional Information:

This message should be sent from shore only, to give water level information to all vessels in a certain area. The message should be sent at regular intervals.
The UN country code and the national unique gauge ID shall be derived from the ISRS code of the gauge station code as part of the RIS Index published in the European Reference Data Management System (ERDMS).
The water level information shall be coded as the difference value of the gauge to the reference water level (e.g. GlW in Germany, RNW on the Danube) as positive or negative value. The Least significant Bit (LSB) of the water level code is used to indicate if the water level is higher or lower as the reference water level. Therefore the definition is different to the usual bit-coding of integer values.

Permitted as from:

10/10/2007

Not to be used after:

18/10/2021

Registrant:

Physical link:

AIS

Message number (0=VDES-VDE):

DAC or VPFI:

200

FI / Message ID:

Technical point of contact:

RIS VTT

State:

deprecated

State link:

Water level message [1]

Number of slots (max):

Last modified:

19/01/2023 - 14:37

Reporting Rate:

This message should be sent from shore only, to give water level information to all vessels in a certain area. The message should be sent at regular intervals.

Details:

	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	As described in Table 2.6
	UN country code	12	UN country code using 2*6-Bit ASCII characters; 0 = not available = default
	Gauge ID	11	National unique ID of gauge 1-2047, 0 = default = unknown
	Water level	14	Bit 0: 0 = negative value, 1 = positive value Bits 1-13: 1-8191, in 1/100m, Bits 0-13: 0 = unknown = default
	Gauge ID	11	National unique ID of gauge 1-2047, 0 = default = unknown
	Water level	14	Bit 0: 0 = negative value, 1 = positive value Bits 1-13: 1-8191, in 1/100m, Bits 0-13: 0 = unknown = default
	Gauge ID	11	National unique ID of gauge 1-2047, 0 = default = unknown
	Water level	14	Bit 0: 0 = negative value, 1 = positive value Bits 1-13: 1-8191, in 1/100m, Bits 0-13: 0 = unknown = default
	Gauge ID	11	National unique ID of gauge 1-2047, 0 = default = unknown
	Water level	14	Bit 0: 0 = negative value, 1 = positive value Bits 1-13: 1-8191, in 1/100m, Bits 0-13: 0 = unknown = default
	Total	168	occupies 1 slot