
Nautical chart
OpenSeaMap is an open source free nautical chart. OpenSeaMap is a subproject of OpenStreetMap.
Nautical information as navigation aids, port information, repair shops and chandlerys are incorporated on a map of the world. A user can draw a navigation plan and obtain the waypoints. The chart can also be downloaded to use it on a laptop or PDA without any internet connection.
For safety reasons, the chart should be use with caution, definitely not for commercial navigation.
The chart can be found there: http://www.openseamap.org