Garmin AIS 800 Class B Transceiver - Reliable Marine AIS Upgrade

Our review of the Garmin AIS 800 Class B Transceiver finds it best suited for boaters who need a compact, standards-compliant AIS unit that integrates cleanly with NMEA 2000 systems. The biggest reason to buy is its combination of a Class B transceiver with a 5 Watt output and built-in GPS functionality, which provides improved vessel visibility and position reporting without requiring a separate transmitter. It is a practical upgrade for sailors and powerboat owners who already use NMEA 2000 chartplotters and want a simple, professional AIS solution.

Key Features

• Class B Transceiver: Provides both reception and secure 5 Watt transmission to make the vessel visible to nearby ships and shore stations, improving situational awareness.
• NMEA 2000 Connectivity: Integrates directly into existing NMEA 2000 networks so AIS targets and alerts appear on compatible chartplotters and multi-function displays.
• Internal GPS: Includes an internal GPS receiver so the unit reports accurate position data without needing a separate GPS source, though an antenna is required for best reception.
• Compact Installation: The modest form factor and marine-focused design make it straightforward to install in tight instrument spaces aboard small yachts and dayboats.
• 5 Watt Output: Delivers enhanced transmission power compared with 2 Watt Class B devices, extending the range at which the vessel can be seen by others.

Who It's For

The AIS 800 is aimed at recreational boaters and small commercial operators who already run a NMEA 2000 backbone and want reliable AIS position reporting and reception. It is a good fit for users who prefer an integrated unit with internal GPS to reduce the need for extra cabling or external GPS sources.

Boaters who do not use NMEA 2000 systems, who require AIS A class functionality, or who need a unit with a built-in antenna should look elsewhere. Installation still requires attention to antenna placement and network connections, so those seeking a plug-and-play solution with no wiring should consider simpler receiver-only devices.

Pros & Cons

Pros

• Class B transceiver capability plus a stronger 5 Watt output increases the vessel's transmission range compared with lower-power Class B units.
• NMEA 2000 support makes integration with modern chartplotters and displays straightforward and consistent.
• Internal GPS simplifies system architecture by providing position data without a separate GPS source, reducing the number of devices to manage.
• Compact marine design fits into tight navigation stations on smaller boats.

Cons

• Requires a separate antenna for GPS reception, so some additional hardware and installation effort is necessary.
• Not suitable for users who need AIS A class features or who do not use NMEA 2000 networks.

Specifications

Product	AIS 800 Class B Transceiver
Brand	Garmin
Output Power	5 Watt
Network	NMEA 2000
GPS	Internal GPS (antenna required)
Type	Class B AIS Transceiver

Our Verdict

The Garmin AIS 800 is a solid choice for boaters who want a compact, NMEA 2000-ready Class B transceiver with the benefit of a 5 Watt output and internal GPS. It represents good value for those who already run a marine network and need improved AIS transmission and target display on onboard chart systems.

Frequently Asked Questions

Does the unit need an external antenna?
It has an internal GPS receiver but requires an external antenna for best satellite reception and reliable GPS fixes.

Will it work with my chartplotter?
Yes, the AIS 800 is designed to connect to a NMEA 2000 network so compatible chartplotters and multi-function displays can show AIS targets.

Is this a Class A unit?
No, this is a Class B transceiver intended for recreational vessels and small commercial craft, not a Class A maritime unit.