Navisu is a nautical navigation software which allow you to display chart with WorldWind.

Before starting NaVisu, go into the worldwind cache directory.

On linux : ~/var/cache/WorldWindData/Earth
On Windows : C:/ProgramData/WorldWindData/Earth

Create a folder called KapLayer and put your tiles inside.

Now, you can launch NaVisu and create the database by selecting the directory which contains your .kap files and here we go.