ACR Electronics Y1-03-0222, AIS-300 manual AIS classes

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On the bottom, a typical Nauticast™-B AIS installation in a common environment is shown. The Nauticast™-B AIS is connected to the vessel‟s 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 an AIS transceiver. 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 “Carrier Sense Time Division Multiple Access”) to send and receive messages. Without the necessity of any operator interaction, both vessels know exactly who or what is cruising nearby and where the individual object is heading.

The scenario below shows a full AIS coverage area (including all applications and complete shore infrastructure).

2.AIS classes

There are two classes of AIS units fitted to vessels, Class A and Class B. In addition, AIS base stations may be employed by the Coast Guard, port authorities and other authorized bodies. AIS units acting as Aids to Navigation (A to N) can also be fitted to fixed and floating navigation markers such as channel markers and buoys.

Class A units are a mandatory fit under the Safety of Life at Sea (SOLAS) convention to vessels above 300 gross tons, or which carry more than 11 passengers in international waters. Many other commercial vessels and some leisure craft also may be fitted with Class A units.

Class B units are designed for fitting in vessels which do not fall into the mandatory Class A fit category. The

ACR Nauticast™-B Automatic Identification System is a Class B AIS unit.

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Y1-03-0222 Rev. C

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Contents Page Y1-03-0222 Rev. C Please Read ALL Warnings Overview What is AIS?AIS classes Product contents InstallationPrerequisites Installation overview and prerequisitesSoftware installation Installation of the .NET Framework Installation of the Windows Installer Installation of the Link2AIS Software Y1-03-0222 Rev. C Y1-03-0222 Rev. C Y1-03-0222 Rev. C Y1-03-0222 Rev. C Connecting to a personal computer PC Software structure Installers only Entering static dataHelp file Y1-03-0222 Rev. C Electrical connections Hardware installationPhysical mounting Antenna installationAntenna connections on the transponder Antenna mountingSwitching on Using the TransponderPower LED indicatorsData port messages Built-in testPower/ Data connection Maintenance Appendix a Serial Data InterfaceSerial Port Input/Output Power up messagesVHF data link messages Nmea 0183 VDM DataVDL Message number VDM Message description VDO Message number VDO Message description VHF data link own vessel messages Nmea 0183 VDOVDO message format ACS message format ACA message formatACK messages AIS alarm messages Nmea 0183 ALR, TextALR message format Format DescriptionParameter Value Appendix B Specifications and WarningsSpecifications System Diagram Appendix C System Block DiagramClass B A2-07-0196-1 Appendix D Data Power Cable InformationDescription DB15 ColorSupport Limited WarrantyUseful Life Policy Other noticesEuropean ManufacturerRepresentative Signed on behalf of ACR Electronics, Inc
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