Alex Mustard :
A constant source of inspiration to underwater photographers worldwide.
British Society of Underwater Photographers :
Formed in 1967, BSoUP is the largest underwater photographic society in Britain.
Burns Electronics :
Australian specialists for servicing and repairing underwater housings.
Sea-Changers is a UK marine conservation charity which works to address threats to the marine environment.
The Guide to Underwater Cameras and Photography :
Wide-ranging underwater photography advice.