The picture below shows the land based generating device which was installed in a small shed on the shore of the island. A video available on the right shows some movement. Click on the picture to zoom in.
One of the bicycle wheels turns when the weight is rising; the other turns when it descends, corresponding to the movement of the ocean waves. There is a small alternator which continually turns to generate power to charge the battery. We managed to get a small amount of movement shown on one video, but the project was abandoned in May 2009 when I had to leave Guinea (son lost medical clearance).
In addition, I almost drowned one day while swimming back to shore after attempting to retie some of the straps to parts underwater. I decided I was too old to do this sort of thing on my own.