SAMS and NAMS pre-purchase survey findings for Florida buyers

What do SAMS and NAMS credentials actually mean for a surveyor?

SAMS (Society of Accredited Marine Surveyors) and NAMS (National Association of Marine Surveyors) are the two primary credentialing bodies for marine surveyors in the United States. Both require documented sea time, formal training, and periodic continuing education. A credentialed surveyor is not the same thing as a marina mechanic with an opinion. You can verify a surveyor's standing at SAMS.

Lenders and hull-and-machinery underwriters almost always require a survey from a SAMS- or NAMS-credentialed surveyor before they'll bind coverage or fund a marine mortgage. The buyer typically pays for the survey. Rates vary, so get a quote from your surveyor before the haul-out is scheduled. The report belongs to the buyer, not the seller or the broker, and it should stay that way.

What does a pre-purchase survey actually cover?

A full pre-purchase survey covers hull structure, deck integrity, machinery spaces, electrical systems, fuel system, through-hulls and seacocks, safety equipment, and cosmetic condition. Each area is scored or described separately in the written report. The surveyor walks the boat with a moisture meter, a phenolic hammer, a flashlight, and usually a mirror on a stick for tight bilge corners.

The sea trial is a separate component from the haul-out inspection, and most surveyors want both. Underway, they're watching vibration, steering feel, engine temperatures, exhaust smoke color, and how the transmission shifts under load. Cosmetic findings (chalky gelcoat, stained teak, faded nonskid) get documented but weighted differently from structural or safety findings. The final report is a written document with photos. It doesn't stamp the boat "approved."

What are the most common structural findings on Florida boats?

Osmotic blistering is the single most common hull finding on fiberglass vessels that have soaked in South Florida's warm water for more than a few seasons. Surveyors quantify moisture with a Tramex or Sovereign meter, taking readings in a grid pattern below the waterline. Readings above the manufacturer's dry baseline get flagged, and clusters of dime-sized to quarter-sized blisters get photographed and mapped.

Delamination shows up next. A surveyor taps decks and coachroof areas with a phenolic hammer and listens for a dead thud instead of a sharp knock. That dead spot usually means water has migrated into a balsa or foam core, typically through a fastener hole that lost its bedding compound years ago. Stress cracks at chainplates, keel attachment points, and transom corners get separated from cosmetic crazing, which is just surface. A crack that follows a load path is not.

Soft spots near cleats, stanchion bases, and windlass mounts point to the same story. Water gets in, sits in the core, and rots out balsa. On a 47' express cruiser we saw last spring at Old Port Cove, three cleat bases had softened enough that the surveyor could push them with a thumb. That's a rebedding job at best and a core repair at worst.

What electrical and mechanical deficiencies come up most often?

ABYC electrical standards define acceptable wire gauge, overcurrent protection, and bonding requirements on recreational vessels. Surveyors reference these standards directly and flag anything that misses them. You can read the standards summary at ABYC. The frequent hits: undersized wiring on stereo and inverter upgrades, missing fuses within seven inches of the battery positive terminal, DIY battery banks added without proper battery-switch integration, and green corrosion on ring terminals in the engine room.

Corroded or improperly bonded through-hulls are a safety-of-life finding. Bronze seacocks that haven't been exercised in three or four years are often frozen, and a surveyor won't sign off on a valve they can't move. Some sellers replace them proactively before survey day. Engine-room findings show up in a predictable pattern: chafed fuel hose against a bulkhead, cracked exhaust bellows on inboards, seized raw-water impellers, and missing flame arrestors on carbureted gas engines.

Shore-power connections are their own category. Reverse polarity, missing galvanic isolators, corroded twist-lock connectors, and pitted shore-power inlets get cited on nearly every survey of a boat that's lived on a dock for a decade. Underwriters read those findings closely, per BoatUS marine insurance guidance.

How do surveyors document cosmetic and detailing condition?

Oxidized, chalky gelcoat gets noted in the hull-and-topsides section of the report. Heavy oxidation, the kind that leaves white powder on your hand when you drag a finger across the topsides, tells a surveyor the boat has been under-maintained on the outside. That prompts them to look harder at everything else. If the owner didn't wax the hull for five years, what else got skipped?

Teak deck condition gets a close look. Soft planks, cracked caulk seams, exposed fasteners, and plug loss all indicate core-moisture risk beyond simple cosmetics. Interior soft goods, headliner staining, and mildew on upholstery show up in the interior section. Those items rarely block financing on their own, but they affect insured value and asking price.

A freshly detailed vessel is not a shortcut around structural problems. A good surveyor sees through fresh wax. But poor surface condition often signals broader deferred maintenance, and surveyors pursue it harder when the boat looks tired. Hull Renew, LLC's Exterior Detailing and Gelcoat Correction services are frequently booked in the window between a survey and closing to satisfy cosmetic conditions written into the contract.

How do pre-purchase findings affect insurance and financing?

Underwriters routinely require deficiency items to be corrected as a condition of binding coverage. Safety findings, expired EPIRB registration, expired flares, missing life ring, undersized fire extinguishers, are usually required to be resolved before the policy goes live. That's a phone call to a chandler and an afternoon, not a deal-breaker.

Marine lenders may require a minimum survey condition rating (often "average" or better on the SAMS 4-tier scale) or a clean survey before funding. A vessel with active water intrusion, soft decks over a large area, or engine-room fire-hazard findings may not qualify for conventional marine financing at all. Buyers can use the findings list to renegotiate the purchase price or require seller-funded repairs at a recognized yard before closing. This is where the survey pays for itself. A single delamination finding on a 55-footer can shift the price $15,000–$40,000.

How should a seller prepare a vessel before a SAMS or NAMS survey?

Surveyors need clear access to bilges, engine rooms, lazarettes, and electrical panels. Remove the water toys. Empty the cockpit lockers. Wipe down the bilge and degrease the engine room a week ahead. A clean bilge doesn't hide problems, but it tells the surveyor the owner cares, and it lets them see hose clamps and stringer bases without a headlamp battle.

Safety-equipment expiration is easy to resolve in advance. Check EPIRB registration dates, flare expiration dates, fire-extinguisher service tags, and life-jacket counts against current USCG requirements at USCG Boating Safety. Addressing known cosmetic deficiencies, gelcoat oxidation, teak seam caulk, faded canvas, before survey shortens the findings list and supports the asking price.

The morning of the survey: exercise every seacock, top off fluids, run the generator under load for thirty minutes, and cycle the air conditioning on both AC and generator power. Nothing burns a seller like a mechanical finding that would have taken twenty minutes to prevent. A frozen head-intake seacock and a generator that won't hold load are the two most common "should have caught this" items on the list.

Frequently asked questions

What is the difference between a SAMS and a NAMS surveyor?

Both are legitimate U.S. credentialing bodies with comparable training and continuing-education requirements. SAMS uses the "AMS" (Accredited Marine Surveyor) and "SA" (Surveyor Associate) tiers; NAMS uses "CMS" (Certified Marine Surveyor). Most lenders and underwriters accept either credential. The individual surveyor's experience with your specific vessel type matters more than which acronym is on the business card.

How long does a pre-purchase survey typically take on a 50-foot boat?

Plan on a full day for a 50-footer: roughly four to six hours dockside and out-of-water for the visual and moisture-meter inspection, plus a one- to two-hour sea trial on a separate morning or the same afternoon. Larger vessels stretch to two days. The written report usually lands in your inbox three to seven days after the sea trial.

What happens if a survey finds serious structural damage?

You have three options: walk away, renegotiate the price to cover the repair, or require the seller to complete the repair at a named yard before closing. Serious structural findings, wet decks over a large area, delamination on the hull, keel-bolt corrosion, often kill deals on older production boats because the repair cost exceeds the price adjustment either party will accept.

How often do osmotic blisters show up on Florida boats?

Very often on vessels that have been wet-slipped in South Florida for more than five years without a fresh barrier coat. Not every blistered hull is a structural problem, cosmetic gelcoat blisters are common and manageable, but a moisture-meter reading well above baseline in laminate below the waterline is a different conversation, sometimes leading to a peel-and-recoat job that runs several hundred dollars per foot or more depending on the yard and the extent of the damage.

Can a seller refuse to fix items flagged in a pre-purchase survey?

Yes. The survey is a report, not a repair order. A seller can decline every requested repair, in which case the buyer chooses whether to accept the boat as-is, renegotiate price, or terminate the contract inside the survey-contingency window. Most transactions settle somewhere in the middle, with safety items fixed by the seller and cosmetic items absorbed by the buyer.