Asking for a "business advisor" is pretty broad, you may get all kinds coming out of the woodwork.
If you're seeking advice from a consultation firm, that may serve your needs, I suggest you get with an attorney and a CPA first to provide due diligence on contracting with a firm.
If this is anything as implied here, I'd say you need specific guidance in marketing and finance, one person won't be that qualified in both fields as they are different specialties, so I'm suggesting experts in each arena.
You'll probably be looking at joint venture partners, the first place to look to investors who already invest in the marine industry. Existing companies willing to expand a market line.
You've made no mention of the financing required, which will have a bearing on types of investors you'll need. You'll be entering the lion's den without a good finance type.
I'm retired, use to do such financing, don't mind passing information but I'm not interested in a job or contracting.
You need an attorney who has done private placements and startups before, your needs will determine the type of entity you should have, partnerships, stockholders or venture capital to principals. A CPA can help identify capital needs, not so much the source, but to due diligence and the financing structure.
Marketing is wide open, either an existing company that has a marketing agency or staff in place or finding a marketing agency to assist you. You should already know enough about your widget to know your target market.
I suggest you take a team approach drawing on specialists rather than betting on one small firm or person. If you need a CEO, that is another search. You'll need money upfront for larger firms, collateral and expertise with a proven track record for larger firms that can simply take charge of all aspect of your business needs.
Good luck!
