You know what they say—knowledge is power. The power of an oceanographer comes from their ability to add to humanity's overall knowledge of the oceans and the life therein. You'll spend your days studying the chemistry of the ocean, or the marine life, or changes in the currents, while your nights will be spent writing all of that into journal-form.
We don't mean journal like a book with all your secrets (you probably don't want that one published). We're talking about the academically-written word salad that'll be your explanation—or findings—of your research. What you end up sharing with the world is the reason you get to go out on the boat in the first place. You might want to use this power in a way that you think will benefit oceans the most.
There are other places for you to use your sea-studying abilities, and many of them will relate to what humanity is doing to them. You may be using your scientist skills to locate potential sites for extracting petroleum, or you may be working to examine ecological systems in order to protect the earth and its natural resources.
The ocean is an expansive, complex, and very important part of our planet. You doing your thing will help us all come to know it a little better.