# What Is a Jones Act Vessel?

A Jones Act vessel is a watercraft that meets three tests: it is owned by a U.S. citizen or company, it operates in navigable waters, and it is used or capable of being used to transport goods or passengers. A seaman injured aboard a qualifying vessel can sue their employer for negligence under the Jones Act (Merchant Marine Act of 1920, 46 U.S.C. § 30104) — a far broader remedy than maritime maintenance and cure.

## What the Jones Act is

The Jones Act — formally the Merchant Marine Act of 1920 (46 U.S.C. § 30104) — regulates the U.S. maritime industry with three aims: protect U.S. shipping interests, support a merchant marine, and protect injured seamen. Its central protection lets a seaman injured on the job sue their employer for compensation, covering economic and non-economic damages such as medical expenses, lost wages, and pain and suffering.

Before the Act, an injured seaman's only recourse was the doctrine of **maintenance and cure**, which obliges the employer to provide medical care, food, and lodging until recovery. The Jones Act added a negligence remedy: prove that the employer, a crew member, or the shipowner caused the injury, and full compensation is available.

## The three tests for a Jones Act vessel

Before a worker can claim Jones Act protection, the watercraft must qualify as a vessel:

- **U.S. ownership.** It must be owned by a U.S. citizen or a U.S. company. It may sail international waters, but ownership must be American — a core goal of the Act is reserving U.S. port-to-port transport to U.S.-owned, U.S.-built ships.
- **Navigable waters.** It must operate in navigable waters — those usable for interstate or foreign commerce, including oceans, connecting canals, and ports, plus rivers or lakes that link states or reach the ocean.
- **Transportation use.** In *Stewart v. Dutra Construction Co.* (2005), the Supreme Court defined a vessel as a watercraft "used, or capable of being used, as a means of transportation on water." That sweeps in fishing boats, freighters, barges, ferries, cruise ships, tugboats, and cargo ships.

## Who qualifies as a seaman

The Act protects **seamen**, not all maritime workers. A seaman is employed to work on a vessel or fleet, performs duties that help the vessel accomplish its mission, and spends a substantial share of work time — generally at least about 30% — aboard the vessel or fleet. A contractor splitting time across many companies, or someone rarely aboard, may not qualify. Offshore oil-rig workers, engineers, painters, cooks, fishermen, and quartermasters often do.

## How it protects injured workers

The Jones Act gives an injured seaman — or their representative, if the seaman died — the right to bring a civil action **with the right to a jury trial** against the employer. Prove negligence and a successful case can recover the full range of damages from the injury.

Whether a particular rig, boat, or platform is a "vessel," and whether a worker is a "seaman," are heavily litigated threshold questions that decide which law governs the claim. A [maritime injury lawyer](/louisiana/) evaluates vessel status and seaman status before the claim is framed, because those answers determine the remedy.

## Frequently Asked Questions

### What are the three requirements for a Jones Act vessel?

It must be owned by a U.S. citizen or U.S. company; it must operate in navigable waters (oceans, connecting canals, ports, and rivers or lakes linking states or reaching the ocean); and it must be used, or be capable of being used, to transport goods or passengers on water.

### Who qualifies as a seaman under the Jones Act?

A worker assigned to a vessel or fleet whose duties contribute to its mission and who spends a substantial portion of work time — generally at least about 30% — aboard the vessel or fleet. Offshore oil-rig workers, engineers, deckhands, cooks, and fishermen can qualify; independent contractors with little time aboard often do not.

### Does the Jones Act cover cruise-ship passengers?

No. The Jones Act protects seamen, not passengers. An injured cruise passenger has other maritime remedies but cannot bring a Jones Act claim.