This timeslider application is for Atyla, a Spanish sailing boat. It is 30 m long and was hand built using traditional techniques to withstand strong winds. In the open ocean and with a skilled crew it can average more than 6 knots.
The map itself was based on a fork of a demo provided here: http://dwilhelm89.github.io/LeafletSlider/
To see the map, a work in progress, please click here: http://robinlovelace.net/sketches/goAtyla/index.html