What Is Ais??? - In A Nutshell - Weatherdock Easy TRX2S serie Handbuch

System requirements
The easy TRX2S programming application is designed to operate with
Microsoft Windows® 2000 (SP 3), XP (SP 2), Vista and Win 7.
Recommended minimum system requirements are:
• Microsoft Windows® 2000 SP3 or Microsoft Windows® XP SP2
• Display resolution of at least 1024 x 768
• At least one USB port
15 What is AIS??? – In a nutshell
Substantial investment over the last few years has resulted in the fact
that transport safety systems in coastal waters are considered to be the
most modern worldwide. The introduction of AIS technology by the
International Maritime Organisation (IMO) will contribute to the
currently available traffic information and thus improve navigation
safety.
This data is exchanged automatically and in short intervals between
AIS devices via specific VHF transmitters and receivers.
The VHF transmitting unit transmits the data telegram via one of two
internationally defined AIS radio frequencies. One of the
characteristics of AIS technology compared to other radio services is
the automatic organization of several AIS devices on just one radio
frequency without disturbing each other.
This is achieved by the SOTDMA transmission method („Self Organising
Time Divison Multiple Access").
The data is transmitted within one or more time-slots via the two radio
channels which are reserved for AIS devices. Each device generates its
own transmission schedule based on the observed past data traffic and
the knowledge about future actions of other AIS devices within radio
range. In this respect, the necessary time slots needed for the
transmission are occupied. The transmitted data packets are received
by every ship within radio range, which is also equipped with such a
device to ensure the transmission of the above-stated data. The
dynamic ship data is transmitted quite frequently compared to the
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