It's not always so blue......

....the North Sea that is.....so it's worth blipping when it is, if only for the novelty value. The greeny patches are rocks just under the surface, and they were much more obvious to the naked eye.....so, a technical question, do I need a filter? (not that the compact will take one, but the other camera will) It's about time I started learning more about the technicalities of photography rather than just pointing, shooting and keeping my fingers crossed!