If you are walking by the sea on a frosty winter’s walk and you see three ships go sailing by, how do you know what they are?  Just have the MarineTraffic – Ship Tracking free app on your phone and you can identify them and find all sorts of details. It will show you their names, where they are from and what their destination is, as well as photographs and all sorts of other information.  They are probably not going to Bethlehem in real life, as it is not by the sea.  You can also use the app to track a ship if someone is away at sea.  This is an absorbing and information packed app if you spend a lot of time on the coast.