RTA at lock/bridge/terminal

Introduction/Additional information:

Introduction:

The RTA message shall be sent as answer to a previously received ETA message (Inland ASM FI 21) from shore to the vessel to confirm the requested time of arrival, or to propose a different schedule.

Additional Information:

As an answer to an ETA message, the RTA shall be sent within 15, maximum 30 minutes after the reception of the initial ETA message.
An RTA message might also be solely initiated by a shore application, e.g. a lock, to inform the addressed ship of the requested time of arrival. An optional ETA message may be sent from vessel to shore to confirm the proposed RTA. If the vessel agrees with the RTA, the time of arrival in the ETA answer shall match with the RTA. In this case no further confirmation RTA shall be expected.
UN country code, UN location code, Fairway section number, Terminal code and Fairway hectometre shall be derived from the ISRS code as part of the RIS Index published in the European Reference Data Management System (ERDMS).
The RTA shall always be transmitted in UTC but for input and display converted in local time of the destination.

Permitted as from:

10/10/2007

Registrant:

Physical link:

AIS

Message number (0=VDES-VDE):

DAC or VPFI:

200

FI / Message ID:

Technical point of contact:

RIS VTT

State:

in force

Number of slots (max):

Last modified:

29/01/2021 - 23:18

Reporting Rate:

As an answer to an ETA message, the RTA shall be sent within 15, maximum 30 minutes after the reception of the initial ETA message.

Details:

PARAMETER	Bit	Description
Message ID	6	Identifier for Message 6; always 6
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 of source station
Sequence Number	2	0 - 3
Destination ID	30	MMSI number of destination station
Retransmit Flag	1	Retransmit Flag should be set upon retransmission: 0 = no retransmission = default; 1 = retransmitted.
Spare	1	Not used, should be set to zero. Reserved for future use.
Application Identifier	16	As described in Table 2,6
UN country code	12	2*6 Bit characters
UN location code	18	3*6 Bit characters
Fairway section number	30	5*6 Bit characters
Terminal code	30	5*6 Bit characters
Fairway hectometre	30	5*6 Bit characters
RTA at lock/bridge/terminal	20	Recommended Time of Arrival MMDDHHMM UTC Bits 19 - 16: month 1 - 12; 0 = not available = default Bits 15 - 11: day 1 - 31 0 = not available = default Bits 10 - 6: hour 0 - 23 24 = not available = default Bits 5 - 0: minute 0 - 59 60 = not available = default
Lock/bridge/terminal status	2	0 = operational 1 = limited operation (e.g. obstructed by technical conditions, only one lock chamber available, etc.) 2 = out of order 3 = not available
Spare	2	Not used, should be set to zero. Reserved for future use.
Total	232	occupies 2 slots