Over the Horizon AIS (OHA)

We are excited to release the all new Over the Horizon AIS (OHA) feature on the DataHub. View AIS data out to 300nm, directly on your chart-plotter and nav apps, so you can sail safer.

Increased Range

Stay safer with 300nm AIS visibility.

Over the Horizon AIS (OHA) increases your AIS range from as low as 5nm to 300nm! If you are sailing at 10 kt using regular AIS and a container ship is sailing directly towards you at 25 kt, you only have 8.5 minutes to react and alter course. On the other hand, OHA would provide you with 8.5 hours warning time.

Some chart plotters cannot display the full 300nm AIS range. For example, Garmin cuts off at 75nm.

Hardware

Powered by the DataHub.

The DataHub has access to the entire global AIS network via your existing internet connection and knows your exact gps location. It then downloads all OHA vessel positions within 300 nm of your current location.

Additional DataHub Features:

How it works

A world-first for AIS.

The DataHub downloads the OHA data approximately once every minute. It is then converted into NMEA and shared to your vessel's instrumentation over WiFi.

OHA targets are displayed on your nav display in the same way as regular AIS targets. When a vessel is located via VHF and OHA, only the VHF data will be displayed.

OHA data can be downloaded via your existing satellite or cellular internet connection.

Redundency

Never be without AIS.

OHA also works as a backup should your standard AIS receiver fail. Ensure you are never without AIS data, which is critical for collision avoidance, security, navigational safety and search and rescue.

To get Over the Horizon AIS working on your boat you will need a DataHub, and a Professional PredictWind subscription.