Getting some data into OSM

Hello all,

I have found river navigation data and was wondering how can I get this into OSM.

The shapefile data can be downloaded from the following link:

Also, I understand that it is possible to have mapnik read and generate tiles off the shapefile data and that you need to know the projection.

Here is the contents of the .prj file


Can someone exmplain to me how to do it, or where I can find some documentation on it?

Warm Regards,

Joe Hildreth