Who (or What) is MarineSurveyor.com?

MarineSurveyor.com is a directory website featuring an international database of credentialed marine surveyors from multiple organizations worldwide. It serves as a resource for individuals seeking marine surveyors and provides information about the practice and disciplines of marine surveying.

What is a Marine Surveyor?

A marine surveyor acts as an objective consultant, similar to a home inspector and appraiser combined for boat purchases. They perform thorough inspections, identify deficiencies, and may specialize in areas such as commercial inspection, damage claim investigations, or valuation services.

Why get a Marine Survey?

Obtaining a marine survey before purchasing a boat is standard practice among experienced boaters. The survey report serves as a negotiation, planning, and budgeting tool, often identifying maintenance issues or deficiencies that could result in significant expenses if left unaddressed.

How much does a marine survey cost?

The cost of a marine survey varies based on factors such as the size and type of the vessel, its age, the scope of the survey, location, and the surveyor's experience. Additional services like sea trials or specialized inspections may incur extra charges.

What are the types of marine surveys?

Common types of marine surveys include pre-purchase surveys, insurance surveys (also known as Condition and Value surveys), appraisal inspections, damage claim investigations, engine inspections, rigging inspections, coatings inspections, and various commercial marine inspections.

How does one become a marine surveyor?

Becoming a marine surveyor typically involves choosing a professional organization, such as the Society of Accredited Marine Surveyors (SAMS®) or the National Association of Marine Surveyors (NAMS®), and pursuing relevant education and training. Practical experience and continuous learning are essential components of the profession.

What is SAMS® (Society of Accredited Marine Surveyors)?

SAMS® is an international organization that maintains ethical and educational oversight of its member surveyors. It offers designations such as Surveyor Associate (SA) and Accredited Marine Surveyor (AMS®) to qualified professionals.

What is NAMS (National Association of Marine Surveyors)?

NAMS is a professional organization that offers designations including Apprentice, Associate, and Certified Marine Surveyor. It provides training and upholds standards for marine surveyors globally.

Sewall Marine Surveying - John Sewall - Marine Surveyor Marine Marketplace

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Surveyor Details

Full Name	John Sewall
Company Name	Sewall Marine Surveying
Credentials, Designations, and Titles	ABYC NAMSGlobal Associate Marine Surveyor
Accepts Assignments In	Appraisals / Valuations Commercial - Workboat Pre-Purchase Surveys - Yacht and Small Craft Insurance Surveys - Yacht and Small Craft
Work Phone	207 805-4532
Contact	Contact Surveyor
Website	Visit Website
Bio	I graduated from Maine Maritime Academy in 1987 with a Marine Engineering degree and served four years in the Navy as a Main Propulsion Officer. I spent 32 years at ExxonMobil, rising to Americas OEM Manager, where I led a team of engineers in lubricant product development and field testing for marine, automotive, and industrial equipment manufacturers. After retiring in 2023, I turned to marine surveying — a natural fit for my technical troubleshooting skills, detailed report writing, and lifelong passion for the marine industry. I apprenticed with a NAMS surveyor for two years and became an Associate NAMS surveyor in 2025, committed to thorough and detailed marine surveys our clients can trust. My wife Leslie and I live in Cape Elizabeth, Maine, and enjoy boating on Casco Bay. Leslie runs the office, and together we're here to help you get on the water safely and confidently. Call us at 207.805.4532.
Address	6 Granite Ridge Road, Cape Elizabeth, ME, USA View Map Get Directions

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Sewall Marine Surveying – John Sewall

Surveyor Details