Nice one Bob, looks like a site to spend time.
I also use this one http://www.shipspotting.com.
Have you ever been on the Pathe news site, and looked at their old film shots of boats? Some very interesting archive footage of all sorts. I once spent an afternoon watching tugs in various ports about the country – in black and white and in that early coloured film. I even found model yachting at Fleetwood from the 1920's.
Kim