Present Bridge Clearance

Introduction/Additional information:

Introduction:

This message shall be sent from shore only, to inform dynamically about the about the actual minimum vertical clearance of a certain bridge opening. The information shall be displayed on an external display such as Inland ECDIS.

Additional Information:

This message should only been send by a competent/waterway authority from shore only.
The ISRS code indicates the position of the bridge opening and shall allow the match with the IECDIS display. It consists of UN country code, Fairway section number, Object code and fairway hectometre as published in the ISRS code as part of the RIS Index published in the European Reference Data Management System (ERDMS).
The bridge clearance value is the actual measured distance from the water surface to the lowest part of the bridge opening according to the width of the fairway given in the RIS Index / IENC.
The ”minutes of the day” provide the absolute time of measurement in minutes since UTC midnight and therefore allow an unambiguous transmission of the age of the data up to 24 hours.
It is recommended that the values transmitted are not older than 1 hour.
If an accuracy information is provided it has to be subtracted from the given actual bridge clearance in worst case. It must by no means seen as indication of additional actual bridge clearance

Permitted as from:

18/10/2021

Registrant:

Physical link:

AIS

Message number (0=VDES-VDE):

DAC or VPFI:

200

FI / Message ID:

Version:

Technical point of contact:

RIS-VTT

State:

in force

State link:

Present Bridge Clearance [1]

Number of slots (max):

Last modified:

19/01/2023 - 14:42

Reporting Rate:

Every 10 minutes

Timeout 60 minutes

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	DAC = 200, FI = 25
	Version indicator	3	The version number of the message default = 1, 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
	Minutes of the day	11	absolute time of measurement in minute since UTC midnight 0-1439, 2047=unknown=default, 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	3	not used. Should be set to zero
	Total	168	occupies 1 slot