Hi Thomas Coupling,
first it isnīt the L it is the P ;-)
As I wrote, this is due to waves from bypassing ships and the zoom-lens used.
If you look close, you see the whole belly - except where there is a littlte wave in front.
One thing which might "helped" the photo, is that you create even waves with the downwash
Helionline.de That picture looks less dramatic.