The accuracy of digital compass headings can be affected by magnetic or other environmental interference, including interference caused by proximity to the magnets contained in the iPhone ear-buds. The user is responsible for the prudent use of information provided by this application and must not use it for direct navigation. Never rely solely on the digital compass for determining direction, proximity or distance. This application should only be used for basic navigation assistance. How do I enable Anchor and Theft Alarms?.Ships moving at over 23 Knots send updates every 2s.Ī boat travelling at 30 Knots would have a placement error of about 14 meters after 2s and 200m after 30s.īoat Beacon interpolates the positions between updates to improve the placement for boats on a slow refresh rate. Boats at anchor and travelling at less than 3 knots only report their position every 3 minutes. The AIS standard has different reporting times. ![]() ![]() So on average these reports are 30s behind real time. The other stations report once a minute, they accumulate the data over a minute and then send it to us. ![]() You can check which areas have direct feeds on this map Direct coverage The majority of the AIS data is fed directly as it is received by the shore stations and typically there is less than a 1 second delay between the ship sending the transmission and it being available to Boat Beacon via the internet. Boat Beacon receives data from a collection of different sources.
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