Yes, you can be arrested on a cruise ship. In practice it happens in two stages: the ship’s captain and private security can detain you onboard, and then government law enforcement—usually the FBI for voyages connected to the United States, or local police in a foreign port—takes custody and makes the formal arrest when the ship docks. Which country’s laws apply depends on where the ship is sailing and whose flag it flies, and the answer is rarely just “U.S. law.” In the third quarter of 2025 alone, cruise lines reported 47 serious incidents to the FBI, most of them sexual assaults.1U.S. Department of Transportation. CVSSA 2025 Q3 Statistical Compilation
Detention by the Ship Is Not the Same as Arrest
Two different things can happen to you on a cruise ship, and they involve two different sets of people with two different sources of authority.
The first is detention by the ship itself. Under maritime common law, the captain has broad authority to confine anyone onboard when the captain reasonably believes it’s necessary to preserve order or protect the safety of the ship, passengers, or property.2Kennedys Law. The Masters Power to Confine Passengers Confirmed by NSW Court of Appeal That can mean being restricted to your cabin with a guard outside the door, or being placed in the ship’s brig, a secure holding cell that most large ships maintain. It is not a formal arrest, and cruise ship security officers are private employees, not sworn law enforcement.
The second is a formal arrest by a government agency. That requires the FBI, the U.S. Coast Guard, or the police of whatever country the ship is docked in. Ship security’s role is to investigate, collect evidence, and hold the accused until custody can be transferred to those authorities at the next port.
Which Country’s Law Applies to You
Where a cruise ship sits at the moment of an incident matters more than most passengers realize.
On the High Seas
Under Article 92 of the United Nations Convention on the Law of the Sea, a ship on the high seas is subject to the exclusive jurisdiction of the country whose flag it flies.3United Nations. United Nations Convention on the Law of the Sea – Article 92 Most major cruise ships are not registered in the United States. They fly the flags of the Bahamas, Panama, Bermuda, or Malta, chosen for lower labor costs, reduced tax obligations, and lighter regulation. So the criminal law of Panama or the Bahamas technically governs the vessel in international waters, even on a cruise that left Miami with mostly American passengers.
Within 12 Nautical Miles of a Coast
Once the ship enters a country’s territorial waters, which extend up to 12 nautical miles from the coast, that coastal nation has full sovereignty, including criminal jurisdiction.4United Nations. United Nations Convention on the Law of the Sea – Part II Territorial Sea and Contiguous Zone Local police can board, investigate, and arrest under their own laws.5National Oceanic and Atmospheric Administration. U.S. Maritime Limits and Boundaries
The U.S. Reach Onto Foreign Ships
The United States doesn’t stop at flag-state rules. Under 18 U.S.C. § 7, federal “special maritime and territorial jurisdiction” includes any foreign vessel during a voyage with a scheduled departure from or arrival in the United States, when the offense is committed by or against a U.S. national.6Office of the Law Revision Counsel. 18 USC 7 – Special Maritime and Territorial Jurisdiction of the United States Defined Added by the Cruise Vessel Security and Safety Act, this provision is why the FBI can investigate and federal prosecutors can charge serious crimes on nearly any cruise that leaves from or returns to a U.S. port.
The result is that a single incident on a Bahamian-flagged ship out of Fort Lauderdale can fall under Bahamian law, U.S. federal law, and the law of whatever country’s waters the ship touches next. Which authority actually takes the case depends on the severity of the crime, the nationalities of those involved, and where the ship docks. As one FBI agent based in Cape Canaveral described the analysis: “Do we have jurisdiction based on where the ship was? What was the next port of call? Was a U.S. citizen involved?”7Federal Bureau of Investigation. Ensuring Safety at Sea
What Crimes Actually Bring in Law Enforcement
Not every shipboard incident triggers an arrest. The Cruise Vessel Security and Safety Act of 2010 requires ships that embark or disembark passengers in the United States to report specific serious crimes to the nearest FBI field office or legal attaché as soon as possible after the incident.8U.S. Department of Transportation. Cruise Line Incident Reports Under 46 U.S.C. § 3507, the reportable categories are:9Office of the Law Revision Counsel. 46 USC 3507 – Passenger Vessel Security and Safety Requirements
- Homicide or suspicious death
- Missing U.S. national
- Kidnapping
- Assault with serious bodily injury
- Sexual assault offenses
- Firing or tampering with the vessel
- Theft of money or property exceeding $10,000
These are the incidents serious enough to trigger mandatory FBI involvement. Lower-level conduct—bar fights that don’t cause serious injury, petty theft, drug possession, disorderly conduct—is typically handled by ship security. The cruise line may confine you, confiscate property, or put you off the ship at the next port, and may still refer the matter to local authorities, but the FBI is generally not stepping in.
What Detention Onboard Actually Looks Like
When ship security responds to a serious incident, the process resembles a police investigation without the procedural safeguards you would have on land. Officers secure the scene, pull surveillance footage (the CVSSA requires ships to maintain camera systems for exactly this purpose), and interview the accused, the victim, and witnesses.10GovInfo. Cruise Vessel Security and Safety Act of 2010 Everything is documented for handover.
You could spend anywhere from a few hours to several days in confinement, depending on how far the ship is from the next port. There is no right to a phone call, no right to an attorney during the voyage, and no judge to review whether the detention is justified. The captain’s judgment is effectively final until the ship reaches port.
The part that catches people off guard is the absence of constitutional protections. Because ship security officers are private employees, Miranda warnings don’t apply to their questioning. You have no obligation to answer, but they don’t have to tell you that. Security can search your cabin and belongings, question you for hours, and hand everything they collect to the FBI at the next port. Miranda protections attach when federal agents take over, but statements you already gave to security are already on the record.
What Happens When the Ship Reaches Port
At the next port of call, the ship’s security team hands over the detained person along with all evidence and witness statements to the relevant law enforcement agency. For voyages connected to the United States, the FBI typically boards the vessel to take custody, and the cruise line’s direct role ends there. You will be processed through the federal criminal justice system, usually in the district where the ship docks.
If the ship is in a foreign port and local authorities assert jurisdiction, you enter that country’s legal system, which may have very different rules for bail, pretrial detention, legal representation, and trial. The ship will not wait. Your cruise continues without you, and you are responsible for your own return travel, legal fees, and detention costs. The cruise line will typically not refund the rest of your trip.
If You’re Handed to Foreign Authorities
American citizenship gives you no immunity from another country’s laws. If you’re arrested at a foreign port, ask the detaining authorities to notify the nearest U.S. embassy or consulate immediately.11Travel.State.gov. Arrest or Detention Abroad
Consular officers can provide a list of local English-speaking attorneys, contact your family or employer with your permission, visit you, ask local officials to provide adequate medical care, give you a general overview of the local legal process, and help family members send money to you.11Travel.State.gov. Arrest or Detention Abroad
What consular officers cannot do matters just as much. They cannot get you out of jail, represent you in court, provide legal advice, serve as interpreters, or pay your legal or medical bills.11Travel.State.gov. Arrest or Detention Abroad You are fully subject to the foreign country’s laws.
If You’re Accused of a Crime Onboard
The single most important thing to understand is that you are not required to answer questions from ship security. Politely decline to make statements and ask to speak with an attorney as soon as possible. Everything you say during an onboard investigation will be handed to law enforcement, and no lawyer will have reviewed any of it. Constitutional protections in a federal case, or local legal protections in a foreign one, begin when the relevant government takes custody. They don’t reach back and undo what you already told private security.
Keep your own record where you can: the names of security personnel you spoke with, the times of interactions, photos of anything relevant, and the contact information of witnesses. Investigations onboard move fast and favor whoever documents the most.