RSA Sailing Links
Crouch Harbour Authority
Roach Area Fairways & Conservation Committee
Crouch Area Yachting Federation (CAYF)
The RYA site is a great place to start surfing the sailing net.
The Coastguard
The RNLI,
The Cruising Association.
Hostellers Sailing Club,
The Royal Corinthiam Yacht Club,
The Crouch Yacht Club,
The Bradwell Cruising Club (some interesting Weather links here),
The Essex River Police,
The Port of London Authority
Frank's sailing site with loads of weather links & tips
Stour Sailing Club, Manningtree