Do they mean this Eckernförde Bay? https://www.google.com/maps/@54.4733896,9.8473616,800m/data=...
Here? https://www.marinetraffic.com/en/ais/home/centerx:9.973/cent...
https://map.openseamap.org/?zoom=15&lat=54.54194&lon=10.0440...
Map of vessels passing through from Aug 18 - Aug 21 https://imgur.com/a/yLedgc6
Left track passed through Aug 18, right two tracks passed through Aug 20.
Vessel Hex Callsign DJ3767 MMSI 211191450 Vessel SY Malika Callsign DK7486 MMSI 211634590
These boats did not move a 750kg monitoring station, even in a hurricane, which there wasn't.
>The system is based on the collection and processing of data transmitted via the AIS (Automatic Identification System). The AIS-Receiving stations that comprise the MarineTraffic network pick-up such data and share it with the MarineTraffic central database.
>All vessels equipped with an AIS transponder emit AIS-data which can be received by any AIS-receiving unit provided it is within range. AIS message packets are encoded in NMEA sentences (64-bit plain text). A sample is shown below:
>!AIVDM,1,1,,B,1INS<8@P001cnWFEdSmh00bT0000,0*38
>The contents of any incoming NMEA sentence can be decoded. This way, information on the following three basic sections can be deducted:
>Dynamic Information, such as the subject vessel’s position, speed, current status, course and rate of turn. Static Information, such as the subject vessel’s name, IMO number, MMSI number, dimensions. Voyage-specific Information, such as the subject vessel's destination, ETA and draught. The central database constantly receives and processes large amounts of AIS-data and stores the most important part of it (together with geographic information on a multitude of ports and areas, vessels' photos and other details). Current positions and/or tracks of vessels are displayed on the MarineTraffic Live Map while Positions History, Vessel Details, Port Conditions and Statistics can be easily found using our dedicated web pages.
From - https://help.marinetraffic.com/hc/en-us/articles/205413667-H...
All in, the larger AIS data aggregators collect about 500 million messages a day from around 150,000 vessels through terrestrial and satellite sources. Access to the full feed, with no delay, is sold for up to $500k/year, though typical deal sizes are around $75k/year. Access to online map-based products usually cost around $10k/year.
<== Used to work for one of the large AIS companies
I vaguely remember reading that US warships in recent accidents had stuff ~like this turned off.
They have this "contact us for pricing" form, which means sales dance is in order, which i want to avoid.