823602 AIS positional signals were detected from 350 ships that have the word “
MAERSK” in their name and whose AIS signals were transmitted over AISHUB. Data was recorded from 2017-12-16 19:56:09 to 2018-01-04 22:19:20.
Continue reading Essential knowledge: MAERSKs global density pattern
532 different ships have been detected in 6 months. The frequency of different ship types has been summarised in the following picture.
Continue reading Shiptypes detected at local AIS station in Skelmorlie, North Ayrshire, Scotland
These are the frequencies of DAC FID pairs in AIS Message 6 in data coming over AISHUB. 1586084 messages were recorded and analysed with R. With the pages from
Arundale, gpsd and VT-Explorer a guess was made about the content of some of these messages.
Continue reading Frequency of DAC FID pairs in AIS Message 6
Many AIS messages target specific MMSI. This means a Vessel or VTS (Vessel traffic service), or AtoN (Aid to Navigation) targets its messages to a certain MMSI destination. These messages can be binary, ASCII, Acknowledgements, GPS corrections, interrogations or assignment mode commands.
Continue reading How to visualize global ship AIS directed communication?
Wind farms in the North Sea
1496 unique MMSI were extracted from
AISHUB‘s data feed from Message 21 ( Aid-to-Navigation Report). This was analysed with a simple R script.
Interestingly many windfarms in the North Sea report as AToNs.
Continue reading The most common Aids to Navigation (AtoNs)
These are the most reported destinations from 51444 ships (MSSI) (AIS Message 5) as pulled from AISHubs data feed. Interestingly major harbours from the People Republic of China are under represented.
Continue reading Most reported AIS CLASS A destinations
After receiving AIS
Type 24, Messages (Static Data Report) of 16085 different MMSIs (ideally Class B ships), the following seem to be the most commonly used Vendor IDs.
Continue reading Most common AIS Class B vendor IDs.
Travel distances of Clyde CalMac Ferries
Name MMSI Distance traveled (km) Daily km traveled Yearly km traveled mean daily return crossings
Loch Shira 235053239 6358.547 94.90369 34639.85 25.10680
Argyle 235052541 9859.771 147.16076 53713.68 6.523083
Bute 235025112 8482.798 126.60893 46212.26 5.612098
Coruisk 235008929 4393.820 65.57940 23936.48 2.906888
Recorded travel distances Clyde CalMac Ferries from the 29th of September 2017 to the 4th of December 2017. Daily crossings estimates as 22.56 km return Wemyss Bay - Rothesay and 3.78 km Largs - Cumbrae Slip.
By logging to a Mysql table all recorded GPS positions, we see the workload that is put on these RoRo ferries.
Continue reading Travel Distances of Clyde Estuary Calmac Ferries