Trailer Sailer Place - a great resource for trailer sailer topics including trailer & boat set ups, cruising, crew etc
http://www.marinetraffic.com/ais/ - AIS (Automatic tracking system) for ships over 300 tonnes and all passenger ships. This website allows tracking of all these ships showing their unique identification, position, course and speed if you have internet access (ie laptop, smartphone) and dont have an AIS capable VHF radio. For those that venture out on the sea and mix it with the big boys, it's another tool to avoid a possible collision.