This is more technology that's cool but that's been around for ever than science but, my mother and father-in-law are are sailing around the world and have been doing so for 10 years. They just passed through the Panama Canal this morning and I captured this video of them from a webcam at the Mineflores locks at the Pacific end of Gatun Lake, Panama. They are in the centre of the three boats that are rafted together and those locks are big enough for really really big ships.
The webcams are at:
http://www.pancanal.com/eng/photo/camera-java.html