Florida has no statute that bans diver hull cleaning in the water. What does apply: Florida's Clean Marina best practices tell marinas to prohibit in-water pressure washing and hull scraping; marinas increasingly require approved vendors with insurance certificates and scheduling through the dockmaster; manatee protection zones and idle-speed rules run from November 15 to March 31; and the state's antifouling law restricts tin-based (TBT) paint, not copper.
Is it legal to have a diver clean my boat in the water in Florida?
Yes. We could not find a Florida statute or administrative rule that prohibits in-water hull cleaning by a diver. The state's antifouling law, Chapter 376 of the Florida Statutes, restricts organotin (tributyltin, TBT) antifouling paint to licensed applicators on vessels over 82 feet or with aluminium hulls; it says nothing about cleaning. Copper-based antifouling paint is not restricted in Florida; Washington and California are the states with copper rules.
What you will run into instead are marina rules, environmental best practices that marinas adopt, and wildlife protection zones. Those are covered below, and they are the reason a dockmaster wants to know who is under the boats and how they work.
What do Florida's Clean Marina best practices say about hull cleaning?
The Florida Department of Environmental Protection's Clean Marina program is voluntary, but designated marinas follow its best-management-practices manual (2020 edition), and many others borrow from it. On hull maintenance the manual tells marinas to:
- Prohibit pressure washing for boat cleaning in or over the water.
- Encourage sponges or soft towels for regular cleaning of the underwater hull.
- Avoid in-the-water hull scraping and any abrasive process underwater that may remove antifouling paint.
- In mooring fields, not authorise hull scraping or painting at all.
Our method fits inside those lines by design. Ultra-Cavitation lifts growth with imploding bubbles at far lower pressure than a pressure washer, with no scraper and no chemicals, and it is what we use on every hull, prop, piling and seawall. The comparison guide shows how it differs from jets, blades and brushes.
What can my marina require from a hull-cleaning diver?
Whatever its lease and insurance carrier ask for, and in South Florida that list is getting longer. The rules we see most often at marinas from Miami to Jupiter:
| Marina rule | What it means for you |
|---|---|
| Approved-vendor list | The diver must be registered with the marina office before working on any boat there |
| Certificate of insurance (COI) | The marina wants proof of liability coverage, often naming the marina and the vessel |
| Scheduling through the dockmaster | Dives are booked with the office so the marina knows who is in the water and when |
| Method restrictions | No in-water pressure washing or scraping, per Clean Marina practices |
| Check-in and dive flags | Divers sign in, fly a dive flag and stay clear of vessels under way |
Common vendor rules at South Florida marinas.
Barnacle Doctor carries $2,000,000 in liability insurance through Fisk Marine Insurance. Tell us which marina the boat is in when you book, so the marina's vendor requirements are met before the first dive. If the boat is at a private dock there is nothing to arrange; the diver works from your dock, and you do not need to be there. In a gated community the divers call ahead and send a text right before the visit.
How does manatee season change diving?
Manatee season runs from November 15 to March 31. Broward County counts more than 1,200 manatees, roughly a fifth of the state's population, and Port Everglades keeps a 6,000-foot idle-speed zone in the Intracoastal in season. Palm Beach County's zones are set out in Florida Administrative Code 68C-22.009, and the FWC publishes protection-zone maps for every county. Marinas with five or more slips in Broward need a Marine Facility Operating License under the county's Manatee Protection Plan. Miami's river and canals gather manatees in winter too.
For a diver the rules are simple and federal: manatees are protected under the Marine Mammal Protection Act and the Florida Manatee Sanctuary Act, so we look before entering, keep our distance, and never touch or feed them. Cleaning continues through the season; it just starts with a look around the slip.
What about copper antifouling paint?
Copper is the biocide in most antifouling paint sold in Florida, and Florida does not restrict it. The regulatory activity on copper paint in the United States has been in Washington State and California, where rules have been phased in for recreational vessels; an industry regulatory update lists those as the two states with copper restrictions. Florida's Chapter 376 targets TBT paint, not copper.
That said, the reason Clean Marina practices discourage scraping and pressure washing is exactly the copper: abrasive cleaning strips paint and its biocide into the water. Gentle monthly cleaning releases far less and keeps the paint working, which is the argument for the 30-day interval as much as for the method.
What should I check before hiring any hull-cleaning diver?
- Insurance that covers the diver, not only the boat. Ask for the carrier and the limit. Ours is $2,000,000 in liability through Fisk Marine Insurance.
- Proof of work. Photos of the hull and running gear after every cleaning and a written report. Ours lists zinc percentage per anode and bottom-paint condition every month.
- How you are billed. Per foot, flat or hourly, and how often. We bill monthly on the monthly plan; see what hull cleaning costs for what drives a quote.
- Anodes. Whether zincs are checked every visit and replaced at 50%, and whether the diver stocks them.
- Marina standing. Whether the diver is on your marina's vendor list, or will get on it before the first dive.