Garmin Signal VHF 400 Radio

The Garmin Signal™ VHF 400 is a premium marine VHF radio featuring an integrated Class B SOTDMA AIS transponder and a high-resolution 3.5" colour touchscreen display. Designed to provide reliable communications and enhanced situational awareness, it combines advanced VHF functionality, AIS transmission and reception, GNSS positioning and seamless integration with Garmin marine electronics.

Its adaptive noise cancellation technology helps deliver clear communications in challenging marine environments, while built-in hailer, intercom and weather monitoring functions make it a versatile solution for both recreational and professional vessels. The integrated AIS transponder improves vessel visibility and helps monitor surrounding maritime traffic in real time.

• Garmin part number: 010-02951-00.


• Marine VHF radio with integrated AIS transponder.


• Class B SOTDMA AIS technology.


• 3.5" IPS colour touchscreen display.


• 640 × 480 pixel screen resolution.


• Up to 1,000 nits display brightness.


• IPX7 waterproof rating.


• Supports international, USA and Canadian marine channels.


• ATIS compatible for inland waterway operation.


• Selectable transmission power: 1 W or 25 W.


• Integrated AIS transmission and reception.


• 5 W AIS transmission power.


• Adaptive noise cancellation.


• Dual Watch and Tri Watch channel monitoring.


• Audio recording and playback capability.


• NOAA weather alerts and weather channel monitoring.


• Integrated hailer and foghorn functionality.


• Listen-back feature for hailer communications.


• Built-in intercom functionality.


• AIS target tracking and display.


• AIS collision warning alerts.


• Man Overboard (MOB) alert support.


• Integrated multi-constellation GNSS receiver.


• Supports GPS, GLONASS, Galileo and BeiDou satellite systems.


• 10 Hz position update rate.


• NMEA 2000® networking compatibility.


• Wi-Fi® connectivity (802.11 b/g/n).


• Compatible with Garmin Marine Network systems.


• Supports up to five Garmin RM 100 remote stations.


• Night mode display for low-light operation.


• Stealth mode for silent operation.


• External speaker output up to 15 W RMS.


• Hailer output up to 25 W RMS.


• Operating voltage: 9.6 to 32 V DC.


• Operating temperature range: -20°C to +55°C.


• Main unit dimensions: 75 × 160 × 104 mm.


• Main unit weight: 655 g.


• SO-239 antenna connector (50 O).


• SMA connector for optional external GNSS antenna.


• Multi-language user interface.

Box contents:

• Garmin Signal™ VHF 400 marine radio.


• Handset microphone with integrated speaker.


• Protective cover.


• Power and external audio cable with fuse.


• Microphone power cable with fuse.


• NMEA 2000® drop cable.


• Mounting template.


• Installation hardware.


• Documentation.