VHF antenna for AIS – Recommendations and connection of AIS650/AIS700

To achieve maximum performance from your VHF radio and AIS transceiver, it is important to understand how antenna installation and connection affect signal strength. Each unit should ideally have a dedicated VHF antenna to avoid signal loss that can occur when using antenna splitters, couplers, or extension cables.

• NMEA recommendation: Place VHF antennas at least 1.2 meters (4 feet) apart to avoid overdriving and damage to receivers.
• If multiple antennas are not possible (e.g., on sailboats with mast mounting), use a Class B AIS antenna splitter such as AIS100 to share an antenna between AIS and VHF radio.
• Raymarine does not specify a general maximum gain for VHF antennas, but for Class B AIS transceivers (AIS650, AIS700), antennas with a maximum of -3 dB gain are recommended.
• The AIS700 has a built-in splitter, which simplifies installation and reduces the need for additional equipment.

How to connect AIS650 or AIS700 to a laptop?

To configure MMSI and perform diagnostics, ProAIS2 software (not ProAIS) is used. Follow these steps for correct connection:

1. Download the reseller version of ProAIS2 from Raymarine's portal. This version also includes the necessary drivers.
2. Disconnect the Power/NMEA 0183 cable from the AIS unit before connecting to the computer. The computer's USB port will provide power to the unit.
3. Connect via USB:
   • AIS650: Use the included USB cable.
   • AIS700: Use a good quality USB Type A to Micro B cable.
4. Install drivers included with the ProAIS2 software.
5. Start ProAIS2 and select the correct COM port (e.g., "AIS CLASS B TRANSCEIVER (COM x)"). Click CONNECT to establish communication.

Tip: If the computer does not recognize the unit:

• Check the quality of the USB cable – cheap cables often cause problems.
• Listen for connection sounds from the computer when the cable is plugged in.
• Check Device Manager – the AIS unit should appear as "AIS Virtual COM Port" under the "Ports (COM and LPT)" category.

Software update for AIS700

The AIS700 is designed to be updated via a connected Axiom Pro MFD. Follow the instructions on Raymarine's official update page for AIS700 to ensure you have the latest software.