AIS 800 transponder transmitter-receiver

The Garmin AIS 800 is a transponder transceiver. Unlike a simple receiver that only receives signals from other vessels, the AIS 800 both receives and transmits your vessel’s data. This allows other AIS-equipped boats to see you on their displays, significantly improving safety and collision avoidance, especially in high-traffic areas or reduced visibility conditions.

The Garmin AIS 800 is an AIS Class B transponder. It is designed for recreational vessels and small commercial boats not subject to SOLAS regulations, offering a good balance between performance and cost.

No, not necessarily. One of the major advantages of the Garmin AIS 800 is its integrated VHF antenna splitter. This allows you to use a single VHF antenna for both your VHF radio and AIS transponder, simplifying installation. Additionally, the device features an integrated GPS and a connector to optionally add an external GPS antenna (model GA 38), which is not included.

The AIS 800 provides dual connectivity for easy integration:

NMEA 2000: For simple and rapid "plug-and-play" connection with modern navigation systems. NMEA 0183: To ensure compatibility with older equipment lacking an NMEA 2000 port. This versatility allows it to integrate into most marine electronic installations.

Yes, absolutely. Thanks to its compliance with NMEA 2000 and NMEA 0183 standards, the Garmin AIS 800 is compatible with the vast majority of chartplotters and multifunction displays on the market (Raymarine, Simrad, B&G, Furuno, etc.) capable of displaying AIS targets.

Yes, this is a mandatory step. Before it can transmit, the AIS 800 transponder must be programmed with your vessel’s specific information, including your MMSI (Maritime Mobile Service Identity) number, boat name, call sign, and dimensions. Without this programming, the device will only operate in receive mode.

The Garmin AIS 800 transponder has a transmit power of 5 watts, which meets the standard for Class B AIS devices.

The Garmin AIS 800’s power consumption is relatively low:

On a 12 Vdc system: less than 400 mA on average. On a 24 Vdc system: less than 250 mA on average.

The integrated splitter is designed to minimize signal loss (very low insertion loss). For most recreational boating uses, VHF radio and AIS performance will remain excellent. However, to achieve absolute maximum range, using dedicated and separate antennas remains the technically optimal solution.

Yes, the Garmin AIS 800 has a silent mode (Silent Mode). This mode can be activated via an external switch (not supplied) to be connected to the device's wiring. In silent mode, the AIS 800 stops transmitting your boat's information but continues to receive data from other vessels, allowing you to remain discreet while maintaining situational awareness of surrounding traffic.

The Garmin AIS 800 "black box" unit is designed to be compact and easy to install. Its dimensions are 175 x 142.3 x 54.5 mm. The weight of the unit alone is approximately 414 grams.

The Garmin AIS 800 transponder has an IPX7 waterproof rating. This means it is protected against accidental immersion in water up to 1 meter deep for 30 minutes.

No, the Garmin AIS 800 pack does not include an external GPS antenna. The device has an integrated GPS and a connector to optionally add an external antenna (such as the GA 38).

Yes, initial programming can be done by the user. It requires connecting the AIS 800 to a PC via a USB cable (usually supplied) and using Garmin’s configuration software. Note: the MMSI number can only be entered once. If an error occurs, the unit must be returned to an authorized dealer for reset.

The Garmin AIS 800 has a Load Equivalency Number (LEN) of 2. This information is important for calculating the total consumption of your NMEA 2000 network and ensuring its power supply is adequate.

The standard contents of the box usually include:

AIS 800 transponderVHF antenna extension (1.2 meters)Power/data cableNMEA 2000 drop cable (2 meters)NMEA 2000 T-connectorUSB adapter cableMain unit mounting kitDocumentation

The AIS 800 transponder is compatible with 12 Vdc and 24 Vdc electrical systems, allowing it to be installed on the vast majority of recreational boats and small commercial vessels.

Once programmed, the AIS 800 transmits a set of dynamic and static data, including:

Dynamic data: Position (latitude/longitude), speed over ground (SOG), course over ground (COG), rate of turn. Static data: MMSI number, ship name, call sign, ship type, ship dimensions.

Yes, the AIS 800 can be connected to a computer via its USB port. This connection is primarily used for initial programming of the device (MMSI number and other vessel data). It can also be used for diagnostics or to view AIS data on a PC-compatible navigation software.

The AIS 800 transceiver should be installed in a dry, well-ventilated location, protected from direct water spray and extreme temperatures. Avoid placing it near sources of electromagnetic interference such as magnetic compasses, power cables, or large metal objects.

Yes, the Garmin AIS 800 is designed to be compatible with a wide range of Garmin chartplotters, including older models such as the GPSMAP 7x2, 8x2, and 10x2. Thanks to its dual NMEA 2000 and NMEA 0183 connectivity, it can integrate with older systems that lack an NMEA 2000 port. Simply connect it via the NMEA 0183 port on your chartplotter to receive and display AIS data.

Yes, it is possible. The Garmin AIS 800 has a standard NMEA 0183 output that allows it to communicate with most chartplotters on the market, regardless of brand. However, full compatibility (such as controlling transmission or displaying specific menus) is only guaranteed with Garmin chartplotters. For integration with another brand, you will generally need to connect the NMEA 0183 wires (TX+ and TX-) to the NMEA inputs of your chartplotter. Check your chartplotter’s manual for wiring specifications.

No, the Garmin AIS 800 does not require any subscription. AIS (Automatic Identification System) is a free system. Once the device is installed and configured with your MMSI, it transmits and receives AIS data without additional charges. You do not need to pay any fee to use the service, unlike some satellite systems.

Yes, it can be used, but the VHF antenna installation is crucial. Carbon masts can disrupt radio signal reception and transmission. It is recommended to install the AIS antenna at the top of the mast, ideally with a suitable ground plane. If the mast is carbon, you may need to use an antenna with an integrated ground plane or a dedicated antenna to avoid interference. Consult a professional installer to optimize the placement.

Yes, the Garmin AIS 800 is designed to work in perfect synergy with Garmin VHF radios, such as the VHF 200 or VHF 300 series. When connected via the NMEA 2000 network, it can share information with the radio, such as position data for DSC (Digital Selective Calling). However, it does not replace a VHF radio and does not allow voice calls to be made. It is a complementary safety device.

Yes, the Garmin AIS 800 is fully compatible with the NMEA 2000 protocol. It comes with a standard NMEA 2000 connection cable (with a T-connector). This allows for easy integration into an existing NMEA 2000 network. It can then share AIS data with all devices connected to the network, such as chartplotters, navigation instruments, and autopilots.

Yes, the Garmin AIS 800 comes with a metal mounting bracket. This bracket allows the unit to be securely attached to a flat surface, such as a bulkhead or panel. It is designed for installation inside the boat. The bracket is supplied with the necessary screws. It is important to choose a location that is accessible for connections but protected from water spray.

Yes, the Garmin AIS 800 can be used with an autopilot, but indirectly. It transmits AIS data (position, heading, speed) to the NMEA 2000 network. If your autopilot is connected to this network, it can use this information to, for example, automatically avoid collisions (if this function is supported by the autopilot). However, the transponder itself has no direct control function over the autopilot.

Yes, the Garmin AIS 800 is compatible with proximity alarm systems (such as AIS SART or collision alarms). When connected to a compatible Garmin chartplotter, the chartplotter can analyze the received AIS data and trigger visual and audible alarms if another vessel is at a dangerous distance or trajectory. This feature significantly enhances safety, especially in low-visibility conditions.

Installing the Garmin AIS 800 is within the reach of a competent DIYer, especially if you are familiar with marine electrical systems. The NMEA 2000 connections are straightforward (T-connections). However, the NMEA 0183 connection and the antenna require careful attention. If you are unsure, it is strongly recommended to hire a professional installer to ensure correct installation, proper sealing of connections, and error-free MMSI programming.