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What is Over the Horizon AIS
What is Over the Horizon AIS

You can now see up to a 300NM range of AIS targets with PredictWind and the DataHub.

Keryn McMaster avatar
Written by Keryn McMaster
Updated over a week ago

With Over the Horizon AIS (OHA), you can now view AIS data up to a range of 300 nautical miles directly into Chartplotters and Navigation Apps.

The DataHub (required) fetches OHA data from Starlink, 4/5G LTE cellular, or an Iridium GO exec connection, converts it into NMEA format, and transmits it to your vessel's instrumentation or Navigation Apps via WiFi or NMEA. Important note: OHA is unavailable via the Iridium GO!

Gone are the days of limited AIS visibility. OHA revolutionizes how sailors perceive their surroundings, extending the AIS range from a mere five nautical miles (VHF range) to an impressive 300 nautical miles. Picture this scenario: cruising at 10 knots, you spot a container ship approaching at 25 knots. With conventional AIS, you have a mere 8.5 minutes to react. However, with OHA, you gain 8.5 hours of advanced warning, empowering you to navigate safely and confidently.

OHA is compatible with leading Chartplotter brands such as B&G, Raymarine, Garmin, Navionics, Open CPN, and Aquamaps. OHA ensures seamless integration into your existing navigation systems.

OHA is not a replacement for VHF AIS. Still, it will serve as a reliable backup in case of standard AIS receiver failure, ensuring you're never without critical collision avoidance, security, and navigational safety. By downloading OHA data through your existing satellite or cellular internet connection, you can stay connected and secure, even in remote or challenging maritime environments.

Incorporating OHA into your vessel is straightforward, requiring only a DataHub and a Professional PredictWind Forecast Subscription in conjunction with your chartplotter, navigation App, and AIS transponder.

To set up OHA in your DataHub, please see this help article.

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