The vessel is likely out of range. AIS technology range is about 30-50 nautical miles offshore.
Yes, they are. Sometimes problems exist with the AIS receiver, the antenna or the server.
The update rate of all vessel positions is 60 seconds.
The central database receives and processes a large amount of data and stores most important part of it. It also includes port and area geographic information, vessel photos and other information. Vessels' current positions and/or tracks are displayed on a map, using the Google’s map API. Position history, vessels' details, port conditions and statistics are searchable through our web pages.
Most of our data is based on www.AisHub.net If your area is not covered, you could share your AIS data with AisHub so we can display it on Vessel Finder. Another good way to help is to upload photos. Other people visiting the website will enjoy the beauty of the vessels.
Go to embed map. and copy the code in your HTML page body.
IMO number - 7 digits unique number. A unique identificator for a vessel.
AIS - It's abreaviation of Automatic Identification System.
MMSI - Maritime Mobile Service Identity