Worth a look at these links if you use Chichester harbour at all.
Apparently the Gribble worms have been at it!
The new platform is quite conspicuous during daylight hours but if you have the old Nav marks as waypoints then this will be of interest to you.
http://www.conservancy.co.uk/water/l...tices.asp#1404
and a pdf with further info.
http://www.westsussex.gov.uk/cs/comm...rb250107i9.pdf