Marine growth happens gradually — but the symptoms are easy to spot once you know what to look for. Here are five tells that it is time to schedule a dive.
Most boat owners do not think about their hull until something feels wrong — and by then, the fouling cycle is already well underway. The earlier you catch buildup, the gentler the cleaning, the longer your bottom paint lasts, and the better your boat performs. Here are the five signs we tell every customer to watch for.
1. Reduced fuel efficiency. If you are burning noticeably more fuel to achieve the same cruising speed, your hull is almost certainly fouled. Even a thin slime layer can increase drag enough to chew through 10 to 20 percent more fuel. A heavy growth layer can cost you 30 percent or more. Your fuel bill is one of the most reliable hull-condition indicators you have.
2. Sluggish performance and slow time-to-plane. Boats that used to plane quickly suddenly take longer. Sailboats that used to point well start feeling soft. The boat is the same — the bottom is not. Performance loss is almost always the second-most-noticeable symptom, after fuel.
3. Visible growth at the waterline. If you can see green slime, brown algae, or barnacle starts where the hull meets the water, you can guarantee there is more below. The waterline is the easiest growth zone to colonize because it gets the most light — what you see there is the leading edge of what is happening on the rest of the bottom.
4. A missed cleaning schedule. If it has been more than six weeks since your last cleaning during peak season, or more than eight weeks during winter, you are overdue. Boats that sit on a regular schedule fouling rates we can predict — boats that fall off-schedule fall into the aggressive-cleaning category fast.
5. An upcoming trip, race, or charter. Even if your bottom is borderline, a scheduled cleaning before a major use is cheap insurance. We routinely book "trip prep" cleanings two or three days before a long passage so customers leave the dock with a clean bottom and a clear head.
If any of these sound familiar, give the office a call. We will get a diver to your boat, take a look, and tell you honestly whether you need a full cleaning or just a quick maintenance pass.
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