Tips and Hints
If its one thing i have learned from shooting a lot of long exposure's around the ocean and rocks, and that's to always take a good quality cloth. This is a must as you will need to keep your lense clean and free from all the constant sea mist, and sometimes spray.
I take two cloths. One for wiping down first, then a drier, cleaner one that is kept in my camera bag to remove the smears and smudges. Its the least expensive piece of equipment i have in my bag, but yet is most important.
Your camera should be well cleaned by yourself if you are competent or a professional each time it is used close to the ocean.