[ltrg]

This only covers container ships btw. For full coverage of all vessels, try the 'vessel presence' layer in Global Fishing Watch's interactive map, based on a feed from Spire: https://globalfishingwatch.org/map/

[nehal3m]

https://www.marinetraffic.com has most AIS transponders, I use it to track friends on commercial and private vessels.

[wolvoleo]

https://aprs.fi also shows AIS (as well as ham radio operators which is its primary function)

[joezydeco]

https://aisvesseltracker.com/ is a good one too. Shows a LOT more, including cruise ships and pleasure craft.

[landl0rd]

It's also a bit limited. The gold standard is still kpler.

[cess11]

Thanks for the recommendation, looks interesting. I've used Vessel Finder due to something being a nuisance with Marine Traffic.

https://www.vesselfinder.com/