Last nights BBC2 Coast included a feature on Tom Anderson, who was rescued from the Radio Caroline ship Mi Amigo when she sank on 20 March 1980, returning to the site of the wreck. He was shown sonar images of the ship.
Rich963 from the Radio Caroline Yahoo group has posted the feature to YouTube:
http://www.youtube.com/watch?v=FyHeX9mHBRw
Info via dxld