Crab, if you look at the current Notams, you'll find the following:
FROM: 10/06/03 14:33C) TO: 11/07/31 23:59
E) GREATER GABBARD OFFSHORE WINDFARM UNDER CONSTRUCTION WI 10NM RADIUS
515122N 0015801E, APRX 140 TURBINES (MAX BLADE TIP HGT 450FT).
AVIATION WARNING LGT ON SELECTED PERIPHERAL TURBINES
If you have an up to date 1/4 mil chart of the South East (Sheet 8), you'll see two windfarms marked on the chart, off the Clacton, Essex and Herne Bay, Kent coasts respectively.
I haven't had a look at a marine chart recently but, in most cases, and certainly in the Thames Estuary, ships will invariably be avoiding the shallow water the turbines are built in, before trying to avoid what's built there!
I find it almost impossible to fathom the thought that an Admiralty Chart would not include a windfarm built in the sea - they've been pretty good to date . . .
