I have a sailing yacht with a class B transponder, I've noticed that a lot of AIS apps and programs fail to display her or my neighbours vessels with similar transponders.
Ship Finder HD is one that fails to show her, however Boat Watch shows every vessel and links to this site.
Does anyone know of any other free to use programs that display "all vessels"
![Huh ???](https://forum.shipspotting.com/Smileys/default/huh.gif)
See if you can find " Joker" or " Meghan Alice" in Portsmouth harbour.