by Bob Figular July 29, 2025

When most boaters think about Coast Guard inspections, they picture a local Coast Guard Auxiliary volunteer checking their safety equipment at the beginning of the season. 

If you’re considering larger-scale commercial operations, however, you’ll need something quite different: a Coast Guard Certificate of Inspection.

The Certificate of Inspection, also known as a COI, is a thorough and comprehensive vessel evaluation conducted by the U.S. Coast Guard. Unlike a simple safety check, this inspection determines everything from how many passengers your vessel can safely carry to what routes it’s authorized to operate on professionally.

Let’s look at what’s involved in the Coast Guard Certificate of Inspection, who needs one, and how it impacts maritime operations.

How a Certificate of Inspection Relates to Captain’s Licenses

First, we’ll talk terminology — specifically, the difference between uninspected and inspected passenger vessels.

Uninspected passenger vessels don’t have a Certificate of Inspection, and on them you’re limited to carrying six paying passengers plus one crew member. You can operate an uninspected vessel with either an OUPV/Six-Pack license or a Master captain’s license.

Inspected passenger vessels have undergone the comprehensive USCG vessel inspection process and received their Certificate of Inspection. These vessels can carry more than six paying passengers — up to the number determined by the inspection — but must be operated by someone with a Master captain’s license.

When you’re deciding which type of captain’s license to pursue, I typically recommend aiming for the highest-level license you qualify for. Even if you don’t initially plan to operate larger passenger vessels, you never know what opportunities will come your way in the future. Having your Master captain’s license could open doors that would remain closed to a Six-Pack captain.

Infographic: Understanding the Coast Guard Certificate of Inspection: What It Means for Captains and Vessels

What Is a Coast Guard Certificate of Inspection?

A Coast Guard Certificate of Inspection is an official document issued after an extensive USCG vessel inspection that certifies a vessel meets all federal safety standards for carrying more than six paying passengers.

As I mentioned, this isn’t your typical safety inspection. It’s an extensive documentation of the boat to make sure that — with so many lives aboard — you’re operating safely. Once issued, the Certificate of Inspection documents everything the Coast Guard determined about that specific boat’s capabilities and limitations.

What a USCG Vessel Inspection Covers

When the Coast Guard conducts a USCG vessel inspection to issue a Certificate of Inspection, they evaluate every aspect of the vessel’s design, construction, and safety systems. They then issue specific determinations and requirements for that vessel, valid until the Certificate of Inspection renewal date they set in the documentation.

  • Structural Requirements include verifying that bulkheads are built to proper specifications, confirming the vessel’s length and weight proportions are appropriate, and ensuring the overall structural integrity meets commercial standards.

  • Passenger Capacity Determination involves precisely calculating exactly how many people the vessel can safely carry based on its size, stability, and safety equipment.

  • Route Authorization specifies exactly where the vessel can operate commercially. Some inspected vessels are approved only for inland waters, while others may be authorized for both inland and near coastal operations.

  • Minimum Manning Requirements outline how many crew members are required to safely operate the vessel.

  • Safety Requirements describe exactly what emergency equipment and appliances must be onboard during operation, as well as any additional required training or drills for crew.

Which Vessels Require a Coast Guard Certificate of Inspection?

Any vessel that carries more than six paying passengers must have a Coast Guard Certificate of Inspection and be operated by a captain with their Master’s license. Often, this includes:

  • Ferry boats 
  • Harbor tour boats 
  • Whale watching vessels
  • Water taxis
  • Dinner cruises

Quote: Understanding the Coast Guard Certificate of Inspection: What It Means for Captains and Vessels

The Business Impact of Certificate of Inspection Requirements

Understanding Certificate of Inspection requirements can significantly impact your business planning and growth potential.

If you’re currently operating with an OUPV/Six-Pack license but want to expand beyond six passengers, you’ll need both a Master’s license and access to a vessel with a valid Coast Guard Certificate of Inspection.

Getting a Certificate of Inspection for your own vessel can certainly be lucrative, but it can also be complex and expensive. The inspection process can take months and involves significant costs for surveys, modifications, and compliance upgrades, which is why captains may choose to work with established companies that already have inspected vessels.

The Coast Guard Certification of Inspection: Your Legal Roadmap

If you’re already working with an OUPV/Six-Pack license but want to grow your operation, you have the option of upgrading to a Master captain’s license. But remember: To take out more than six passengers, you’ll still need access to a vessel with a Coast Guard Certificate of Inspection

The Certificate of Inspection isn’t just a formality — it’s your vessel’s permission slip, ensuring safe and legal operation in the commercial maritime world. Vessel inspection isn’t a step any Master captain can skip.

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