Marine survey for a boat loan: what lenders need from it

A lender uses a marine survey to confirm that the boat is in the condition and worth the value the loan assumes. Navy Federal states that “a Marine Survey is required on all used boats/vessels.” Trident Funding says lenders generally require one on a used boat or yacht, and that the buyer usually arranges and pays for it.

Which lenders ask for a survey

From lender pages read on October 24, 2026:

• Navy Federal requires a marine survey on every used boat. If the surveyor notes concerns, it may also ask for a mechanical survey.
• Trident Funding says “lenders generally require a marine survey when financing a used boat or yacht,” and that “a survey may not be required for a new boat purchased from a dealer.”
• Southeast Financial lists a “marine survey for certain vessel types or values” among its requirements.

Even where a lender doesn’t require one, a buyer spending six or seven figures on a used boat usually wants an independent look before the money moves. The survey is also the document that answers the lender’s value question, which feeds straight into loan-to-value and your down payment.

Surveyors aren’t licensed, so look at credentials

The National Association of Marine Surveyors states: “Marine Surveyors Are Not Required To Be Licensed By Any National or State Organization.” Anyone can call themselves a surveyor. The two membership groups below publish their standards for members, which gives you something to check.

SAMS (Society of Accredited Marine Surveyors). A Florida nonprofit founded in 1987 and based in Jacksonville. Its classifications page explains the two grades:

• AMS (Accredited Marine Surveyor) requires “at least five (5) years surveying experience, accumulated within the past ten (10) years,” a written exam and continuing education.
• SA (Surveyor Associate) members haven’t yet passed the exam.

SAMS designations include Y&SC (Yachts and Small Craft, for vessels “up to 200 Gross Domestic Registered Tons”) and separate Engines designations for gas and diesel. For a yacht, look for an AMS with the Y&SC designation. Search at marinesurvey.org/search.

NAMS (National Association of Marine Surveyors). NAMS designations cover “Yachts and Small Craft, Cargo, Marine Warranty, and Hull and Machinery.” The credential to look for is NAMS-CMS. NAMS describes its yacht surveyors as having “specific knowledge of the condition, value, construction, and damage of yachts and recreational vessels.” Its find-a-surveyor directory is linked from the NAMS home page.

Before you hire anyone, ask your lender whether it has a list of surveyors it accepts or a credential it requires. It’s cheaper to ask first than to pay for a second survey.

ABYC standards

The American Boat and Yacht Council is a nonprofit that “develops voluntary global safety standards for the design, construction, maintenance and repair of recreational boats.” ABYC says its standards are “the basis of quality construction and repair practices, certification programs and marine surveys.”

The standards are voluntary and the full library sits behind a member login. In practice that means the surveyor, not you, will be the one reading them. Ask how the report flags items that don’t meet ABYC standards and whether it separates safety items from cosmetic ones. That split is what you’ll negotiate with.

Haul-out and sea trial

Trident describes a lender-grade survey as one that covers the hull, engines, fuel and electrical systems and safety gear, and gives an “estimated market value.” It “may also include an out-of-water inspection and sea trial.” Those two steps are where most of the practical scheduling happens:

1. Haul-out. The boat is lifted out at a yard so the surveyor can see the bottom, running gear and through-hulls. You’ll need a yard slot, and the seller has to agree to the boat being moved.
2. Sea trial. The boat is run under way so the surveyor can see the engines and systems working under load. For a deeper look at the engines, a separate engine surveyor (SAMS has gas and diesel designations) may do this part.

Book both through the seller or the seller’s broker once your offer is accepted, and make sure the purchase agreement gives you enough days to complete them. We don’t publish survey or haul-out costs; we haven’t found a primary source for them. Ask surveyors and yards for written quotes.

What the lender needs from the report

The lender reads the survey for a few specific things:

• Value. The estimated market value sets the “V” in loan-to-value. If it comes in under the price, the lender may lend less, or you may need more down.
• Condition. Problems with the hull, engines or systems can stop a loan or lead the lender to ask for more, the way Navy Federal may request a mechanical survey when concerns are noted.
• Identity. The report should describe the same boat that’s in the purchase agreement and on the title or Coast Guard documentation. Check that the hull identification number and the documentation number match.

Ask the lender before the survey whether it needs the report addressed to it, how recent the survey must be at closing, and whether your insurer will accept the same report. Then order once.

Where the survey fits in the purchase

Your offer should be subject to a satisfactory survey and to financing, so a bad survey lets you renegotiate or walk away under the contract terms. The full order of events is in buying a boat step by step. For used boats, the age limits lenders publish matter as much as the survey; see used boat loans. Questions about a specific boat? Send us your numbers.