What a Captain's License Is and Who Needs One

A captain's license is a credential issued by the U.S. Coast Guard that allows you to operate a vessel for hire — meaning you can charge passengers or clients to take them out on the water. If you own a boat and use it only for personal recreation, you do not need one. If you want to run a charter business, offer fishing trips, teach sailing lessons, or work as a captain for a tour company, you do need one.

The Coast Guard issues several types of captain's licenses depending on the size of the vessel and the waters where you operate. The most common is the Six-Pac license, which lets you carry up to six paying passengers on a vessel under 100 gross tons. Above that size or passenger count, you need a higher-tier license. The license is valid for five years, then must be renewed.

You do not need a captain's license to operate a vessel for personal use, even if that vessel is large. You also do not need one if you work as crew rather than as the person in command. The requirement kicks in only when you are the captain and money changes hands.

Key Takeaways

  • A captain's license is required only if you operate a vessel for hire — that is, if passengers or clients pay you to take them out on the water.
  • The Six-Pac license, the most common type, allows you to carry up to six paying passengers on vessels under 100 gross tons and is valid for five years.
  • You must pass a written exam, provide proof of sea service (usually 360 days of work on vessels), and pass a physical exam and drug test.
  • The entire process typically takes two to four months from the time you submit your process to the Coast Guard.
  • You can take the written exam through third-party testing centers, but you must submit your process and documentation directly to a Coast Guard Regional Examination Center.

Sea Service Requirements: The Foundation of Your process

Before you can sit for the captain's license exam, you must document sea service — actual time spent working on vessels. For a Six-Pac license, you need 360 days of sea service within the five years before you explore. A day counts as any 24-hour period during which you worked on a vessel, even if you only worked part of that day.

Sea service does not have to be as a captain or even in a paid position. Deck crew, mate, deckhand, fishing guide, sailing instructor, or any role where you were working on a vessel counts. You can also combine different types of work — six months as a deckhand, two months as a fishing guide, and time as a volunteer on a research vessel all add up. The key is that you can document it with records from the vessel owner or operator.

If you do not have 360 days yet, you can still start the process. Many people work toward their sea service while preparing for the exam. You will need to show your accumulated days when you submit your process, but you can continue accruing days up until the Coast Guard processes your paperwork.

The Written Exam: Content and Where to Take It

The Coast Guard written exam for a Six-Pac license covers navigation, seamanship, safety, maritime law, and vessel operations. The test has 100 multiple-choice questions and you must score at least 70 percent to pass. You have five and a half hours to complete it. The exam is not offered by the Coast Guard directly; instead, you take it through a third-party testing center — private companies authorized by the Coast Guard to administer the test.

To find a testing center near you, visit the Coast Guard's official website and search for approved testing centers by state. You schedule your exam directly with the center, pay their fee (typically $100 to $200), and take the test on a computer. You receive your score when ready. If you pass, the testing center issues you a score report, which you will need when you submit your process to the Coast Guard.

Most people study for four to eight weeks before taking the exam. Study materials are widely available — the Coast Guard publishes an official study guide, and several private companies sell prep courses and practice tests. Many captains recommend taking multiple practice exams before the real test, since the questions are specific and the material is dense.

Physical Exam and Drug Test Requirements

You must pass a Coast Guard-approved physical exam and a drug test before your license is issued. The physical is not a full medical workup — it focuses on vision, hearing, and color blindness, since these affect your ability to navigate safely. You must have correctable vision of at least 20/40 in each eye and be able to hear a normal conversation at three feet away.

You can have the physical done by any physician, but they must use the Coast Guard's official form (CG-719K). The doctor fills out the form, signs it, and you keep it to submit with your process. The drug test is a standard five-panel screen (marijuana, cocaine, amphetamines, opioids, phencyclidine). You can have it done at any facility that performs DOT-certified drug tests, which includes most urgent care centers and occupational health clinics.

Both the physical and drug test must be completed within one year before you submit your process to the Coast Guard. If you pass the exam but wait more than a year to explore, you will need to repeat the physical and drug test.

Submitting Your process to the Coast Guard

Once you have passed the written exam, completed your physical and drug test, and documented your sea service, you submit your process to a Coast Guard Regional Examination Center. There are 17 of these centers across the United States. You can explore by mail or in person, depending on which center serves your region.

Your process packet includes your exam score report, the completed physical exam form, proof of your drug test, documentation of your sea service (letters from vessel owners or captains confirming your work dates), a completed process form (CG-156E-1 for a Six-Pac license), and a copy of your government-issued ID. The Coast Guard publishes a checklist on its website showing exactly what documents go in each section of the process.

The most common reason applications are delayed or rejected is incomplete sea service documentation. Make sure each letter from a vessel owner or captain includes the dates you worked, the name and type of vessel, and the signature of someone authorized to verify your service. If documentation is missing or unclear, the Coast Guard will ask you to resubmit, which adds weeks to the timeline.

Processing Time and What Happens After Approval

After you submit your process, the Coast Guard typically takes four to eight weeks to process it. During this time, they verify your sea service documentation, check your background, and confirm your exam score and physical results. You can check the status of your process by contacting the Regional Examination Center that received it.

Once approved, the Coast Guard issues your license as a physical credential that arrives by mail. Your license is valid for five years. During those five years, you can operate vessels for hire within the scope of your license — for a Six-Pac license, that means up to six paying passengers on vessels under 100 gross tons in the waters specified on your license (usually either inland waters, near-coastal, or ocean, depending on which you tested for).

Before your license expires, you can renew it by submitting a renewal process to the Coast Guard. Renewal is simpler than the initial process — you do not need to retake the exam or repeat the physical, though you do need a new drug test. Many captains renew their licenses three to six months before expiration to avoid any gap in their ability to operate.

Different License Types for Different Vessel Sizes

The Six-Pac license is the entry point, but the Coast Guard issues several other captain's licenses depending on the size of your vessel and how many passengers you want to carry. If you want to carry more than six passengers, you need a 100-Ton Master license, which covers vessels up to 100 gross tons with unlimited passenger capacity. If your vessel is larger than 100 gross tons, you need a 500-Ton Master or 1,600-Ton Master license, depending on the vessel's size.

Each license tier requires more sea service. A 100-Ton Master requires 730 days of sea service (roughly two years). A 500-Ton Master requires 1,095 days (three years). The written exam is also more comprehensive for higher-tier licenses. If you are starting out with a small charter boat, the Six-Pac license is the right choice. As your business grows and you move to larger vessels, you can test for the next tier.

There are also specialized licenses for specific vessel types — a Sailing Master license for sailing vessels, a Towing Master license if you operate tugboats, and others. The Coast Guard website lists all available licenses and their requirements.

Frequently Asked Questions

Can I get a captain's license if I have a criminal record?

A criminal record does not automatically disqualify you, but the Coast Guard reviews your background as part of the process process. Certain convictions — particularly those involving drugs, violence, or dishonesty — may result in denial. Contact the Regional Examination Center serving your area before you invest time and money in the process if you have concerns about your background.

Do I need a captain's license if I work for a charter company?

No. If you are hired as crew or mate by a charter company, you do not need a captain's license. Only the person in command of the vessel needs one. If you want to start your own charter business or operate your own vessel for hire, then you need the license.

How much does it cost to get a captain's license?

Costs vary, but expect to spend $300 to $800 total. This includes the exam fee ($100–$200), the physical exam ($50–$150), the drug test ($50–$100), and the Coast Guard process fee ($130). Study materials and prep courses are additional if you choose to use them.

Can I take the written exam online?

Yes. Most third-party testing centers offer the exam on a computer at their facility, and some offer remote proctored testing. Contact testing centers in your area to see which options they provide.

What happens if I fail the written exam?

You can retake the exam. There is no limit on how many times you can test, though you will pay the testing center's fee each time. Most people who fail study for another four to six weeks and pass on the second attempt.