Vessel positions get updated as soon as a fresh AIS signal is being received.
With an Open account you can see all vessel positions that are captured by FleetMon's global AIS antenna network. However, when vessels move too far away from shore their signals get weak, are not up-to-date and cannot be received anymore by land-based antennas.
Vessels that sail far away from shore, can be covered by using satellite AIS. The position updates may vary from a few minutes up to several hours. This depends on traffic, weather and also other factors.
That's why we offer you additional vessel tracking based on satellite AIS. Simply head over to the detail page of the ship of your choice. If a position update through satellites is available for it, you can use the update button next to the vessel position map to see it.
Also, you can subscribe to the vessel's AIS data feed to receive all satellite position reports that are captured within the coming 14 days from the ship. Further information will be provided in the info box when clicking the corresponding button.
All you need to do is access the satellite AIS tracking data for your vessel. Then you must purchase a few FleetMon credit points.
By the way, if you constantly require up-to-date tracking information for a large number of vessels, even when they sail on the open sea, the Unlimited Sat accounts might be a better option for you.