ACR Electronics Nauticast 2625 Manuel d'installation télécharger pdf (Page 6)

Installation Manual 2 Y1-03-0204 Rev.K

1.2 AIS in an Operational Environment

This illustration depicts a typical AIS System, where two or more AIS

equipped vessels (and shore based systems) are automatically

communicating with each other.

On the bottom, a typical NAUTICAST installation in a common environment is shown.

The NAUTICAST is connected to the vessels emergency power supply, and in

connection with the VHF, and GPS-Antennas, the minimal requirements for Transponder

operation are fulfilled.

Both vessels in the above illustration are equipped with a NAUTICAST (or any other

certified AIS-Transponder). Due to “Time – Synchronization” they use the same

organization of free and allocated windows (Slots) in the shared VHF Data Link (this

method is called “Self Organized Time Division Multiple Access”) to send and receive

messages.

Without the necessity of any active interaction, both vessels know exactly who or what is

cruising nearby and where the individual object is heading.

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ACR Electronics Nauticast 2625 Manuel d'installation Page 6