A marine surveyor sells opinions. The buyer relies on your opinion to spend $200,000; the insurer relies on it to bind coverage. When a deck goes soft eight months after closing, the first document anyone rereads is your report, and the second call the new owner makes is often to a lawyer. E&O insurance exists for that moment.
The two policies every surveyor needs
Errors & Omissions (professional liability) responds when someone alleges your professional work was negligent: you missed the wet transom, understated the osmosis, overvalued the vessel, or worded a finding in a way that misled. Crucially, it funds your defense as well as any settlement, and defense costs are the bulk of most claims, because plenty of claims are meritless but none are free.
Commercial general liability (CGL) covers a different risk: physical damage or injury during your work. You drop a hatch and crack it, a probe punctures a hose, someone trips over your gear on deck. Some surveyors add coverage for damage to vessels in their care, custody, or control. E&O does not cover any of this, which is why established practices carry both.
What E&O typically costs, and what moves the price
Premiums vary too much by carrier, state, limits, and practice profile for one honest number, but the drivers are consistent:
- Limits and deductible. Common limits run from $250K to $1M per claim; higher limits and lower deductibles cost more. Some client contracts and expert engagements dictate minimums.
- Work mix. Routine recreational C&V work is the baseline. Damage and claims work, expert-witness testimony, and commercial vessel work carry more exposure and higher premiums.
- Revenue and volume. More surveys, more exposure.
- Experience and claims history. New surveyors can struggle to get coverage at all, one structural reason the profession funnels newcomers through apprenticeship and society membership; insurers view SAMS and NAMS accreditation favorably.
Get quotes from brokers who specialize in marine professionals, and price coverage before your first paid survey. Practicing bare, even briefly, puts your house behind every signature.
How surveyor claims actually happen
The recurring patterns are worth studying because nearly all are preventable at the report-writing stage:
- The missed-defect claim. Something fails after purchase and the owner alleges you should have caught it. The defense turns on whether the area was accessible, whether your scope covered it, and whether your report said so.
- The scope-creep claim. The client assumed the survey covered the engines internally, the rig aloft, or the tankage you could not see. If the report's scope and limitations section is boilerplate mush, their assumption becomes your problem.
- The valuation dispute. A lender or estate contests your number. Comparable-based reasoning in the report is the defense.
- The wording problem. A finding written vaguely ("some moisture noted") reads very differently in deposition than a finding written precisely, with location, readings, standard cited, and a prioritized recommendation.
The report is the risk-management system
Insurance pays for the fight; the report decides it. The practices that keep surveyors out of trouble are the same ones that make reports slow to write by hand:
- Explicit scope and limitations on every report: what was inspected, what was inaccessible, what was excluded, in specific language rather than recycled boilerplate that no longer matches the boat.
- Standards citations. Findings tied to specific ABYC chapters, NFPA 302, or CFR requirements are opinions with authority behind them.
- Prioritized recommendations so safety items are unmistakably flagged, an area where ambiguity is dangerous in every sense.
- Photographs, systematically captioned, especially of inaccessible or defect areas.
- Consistency. Claims lawyers hunt for the report that deviates from your own usual standard of care. A consistent template, completely filled out every time, is quiet armor. (This consistency-at-speed problem is precisely what AI-drafted reporting is good at: the structure is never skipped and the standards references are never fumbled, while the judgment stays yours.)
The bottom line
Carry E&O and general liability from day one, size limits to your work mix, and treat every report as the exhibit it may someday become. Surveyors do not get sued for what they found. They get sued for what the report failed to say.