Maintaining and further development of HELCOM AIS The outcome from - - PowerPoint PPT Presentation

Maintaining and further development of HELCOM AIS

The outcome from Helcom questionnaire 2019

Agenda Item 4

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Questionnaire on the status of national AIS

• Background

– Distributed to the HELCOM RS participating States in May 2019 – Replied all (7), except Germany and Lithuania

• Objective

– Technical capabilities of national AIS systems – Improvements needed – Annexes to the RS Technical manual

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The Outcome

• Different volumes of the provided information.
• Some questions were not answered, or answered partially
• Various technical solutions are implemented and maintained.
• Data buffering and retransmission is mainly based on the NPR

capabilities

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AIS status: summary (I)

Coverage: various distances, a full coverage of the coastline AIS messages received/transmitted: in general, the networks are capable to all AIS standard messages. Transmission capabilities – various; (x) Data throughput: various rates reported (from “real time” to “1700 msg/sec”) (x) Data storing by AIS servers: various solutions (from 30 days to several years) (x)

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AIS status: summary (I)

Data filtering capabilities: Supported by all systems, but the solutions are various (x) Outgoing data down-sampling: except for one system, the outgoing data can be down-sampled and the down-sampling rate is configurable (x) Data buffering: Mainly rely on the NPR capabilities (x) Buffered data storing: Detailed reply from one Member (up to 1 month) (x)

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AIS status: summary (I)

Buffered data retransmission: Detailed reply from one Member

(retransmission by NPR) (x)

Data resending priority: Detailed reply from one Member (FIFO) (x) Data storing/archiving: various solutions and terms (x)

(from 30 days “indefinite”)

Provision of stored/archived data: is supported, but in different formats (x) Installation of multiple NPRs: is possible for all

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AIS status: summary (I)

The service contingency plans: implemented by all, except one Member BSs/servers/NPRs/ network monitoring: implemented by all Back-up servers: available for all 24/7 technical support: is available for all, except one Member

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Conclusions

• The provided information allows to assess AIS data flow towards

the regional AIS server and the improvements needed.

• To clarify the remaining or partially answered questions,

Norway (1) will contact Members individually. (x)

(1) host of the Helcom server

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