Supply and service vessels are vessels — their crews are classic Jones Act seamen.
The boats that supply, anchor, and crew every offshore field are unquestionably vessels. For their crews, the Jones Act and unseaworthiness are the core of the case — not a question.
Is an offshore supply or service vessel a vessel, and am I a Jones Act seaman on it?
Generally yes. A supply or service vessel is built to move on the water and serve offshore facilities, which usually makes its crew Jones Act seamen. As a seaman you can sue your employer for negligence under the Jones Act, bring an unseaworthiness claim, and receive maintenance and cure.
Key takeaways
- An offshore supply or service vessel is generally treated as a vessel.
- That usually makes its crew Jones Act seamen.
- Seamen get Jones Act negligence, unseaworthiness, and maintenance and cure.
- The Jones Act needs only a light showing of fault; unseaworthiness needs none.
- Status can still be contested, so the specific assignment matters.
The marine spread that supports the field.
Platform supply vessels (PSVs) carry deck cargo, fuel, water, mud, and equipment; anchor-handling tug supply vessels (AHTS) set and recover anchors and tow rigs; fast supply vessels (FSVs) run priority cargo and personnel; and crew boats move people and supplies. Together they are the marine spread behind every rig and platform.
Their crews — captain, mates, dynamic-positioning operators, engineers, able seamen, and deckhands — are classic Jones Act seamen, with little room for the defense to argue otherwise.
The injuries this work produces.
The work is heavy and exposed: deck-cargo handling and crush; anchor-handling and towing operations on the AHTS, where wire and chain under enormous tension create the risk of snapback — a parted line recoiling with lethal force; mooring and line-handling injuries; personnel transfers by basket or swing rope; man-overboard; crane operations; and the constant hazard of working a moving deck in heavy weather. These are among the most dangerous deck jobs offshore.
Vessels — so the Jones Act governs.
Under Stewart v. Dutra Construction Co., 543 U.S. 481 (2005), any watercraft practically capable of moving on water is a “vessel” — and a supply or service vessel qualifies. That status is the gateway to the strongest remedies in maritime law.
A worker assigned to the supply or service vessel whose duties contribute to its mission, with a connection substantial in nature and duration (the Sanchez / Chandris test), is a Jones Act seaman — with a negligence claim against the employer.
That seaman also has a no-fault unseaworthiness claim if the vessel, its gear, or its crew was not reasonably fit for its purpose.
A service-company or contract worker aboard who is not a crew member can instead sue the vessel for negligence under § 905(b).
On a supply or crew boat, you are almost certainly a seaman — the real fight is proving how the injury happened and who was responsible.
Sound like your situation? Calling us is confidential, costs nothing, and starts nothing you don’t choose to start.
Text (713) 489-2297We've litigated the classification fight.
Doyle Dennis Avery tries the cases where the classification is the battle. In the Bermuda forum-maneuver case, a drillship mechanic's case was kept in Texas; in our seaman-status workboat case, a workboat injury was built across the Jones Act, § 905(b), and general maritime law; in our foreign-employer jurisdiction case, a contractor's fall offshore was pursued to recovery.
If you were hurt on this kind of unit, the first job is to establish what it is, who you were to it, and who else was responsible. That early work is what protects the value of the claim.
What the other side will argue — and how it’s met.
OSV crews are classic seamen, so the defense usually concedes status and attacks fault, causation, and damages instead.
The Jones Act uses pure comparative negligence, so a worker’s own fault reduces a recovery but never bars it — and the hazard is usually the company’s. In one case the firm tried, a jury found the injured worker zero percent at fault.
Under the featherweight causation standard, an employer takes its worker as it finds him. Lighting up a silent or prior condition is a compensable injury, not a defense.
A worker does not need to prove unseaworthiness to win. Employer negligence under the Jones Act stands on its own — a jury can find negligence even where it does not find the vessel unseaworthy.
Insurers hire investigators to film injured workers for weeks and usually turn up nothing, while the treating physicians and the medical record carry the truth.
A supply-vessel case is about deck work in a seaway.
Loading and working cargo on a pitching deck, crane and personnel transfers, mooring and tow lines, and slick walkways are the recurring OSV hazards. The firm reconstructs the deck operation and uses a marine-safety expert to set custom and practice, with the vessel’s logs, maintenance records, and crew accounts carrying the Jones Act negligence and unseaworthy case. Damages turn on lost earning capacity, future medical, and life care — and maintenance and cure is owed regardless of fault while you recover.
An OSV deck in a swell is one of the most dangerous workplaces offshore — which is why the safe method is never optional.
What to protect while it still exists.
The deck operation, the gear, and the crew’s memory are what prove an OSV case, and they change fast.
Photograph the deck, cargo, and gear involved, identify the crane, line, or rigging, and preserve the vessel’s logs and maintenance records before the next voyage erases the scene.
Tell a supervisor and make sure a written incident report is created. For a serious injury the vessel must also file a Coast Guard marine-casualty report (Form CG‑2692); a missing report is itself evidence of a safety failure.
See a doctor promptly and describe exactly how the injury happened to every provider. An honest, contemporaneous record is the backbone of the case.
You are not required to give the insurer a recorded statement, and early “I’m okay” remarks get used against you. Assume you may be watched, and get advice before signing.
From our cases
Frequently asked questions about an offshore supply or service vessel injury claims
Is an offshore supply or service vessel a vessel?
Generally yes. A supply or service vessel is built to move on the water and serve offshore facilities, so courts usually treat it as a vessel for Jones Act purposes.
Am I a Jones Act seaman if I work on an offshore supply or service vessel?
Usually. If you have a substantial connection to an offshore supply or service vessel in both duration and nature, you are typically a Jones Act seaman, able to sue the employer for negligence and claim unseaworthiness and maintenance and cure.
What is the test for whether something is a vessel?
Courts ask whether the structure is practically capable of being used as a means of transportation on water. Something built to move, such as a drillship or supply vessel, usually qualifies; something fixed to the seabed or permanently moored in place usually does not.
Do I have to prove my employer was at fault?
Not entirely. Under the Jones Act you need only show the employer's negligence played some part, however slight, which is a very worker-friendly standard. An unseaworthiness claim requires no negligence at all, only that the vessel or its equipment was not reasonably fit. Maintenance and cure is owed to a seaman regardless of fault.
What can I recover after an injury on an offshore supply or service vessel?
Recovery is measured by category rather than a fixed amount: past and future medical care, lost wages and lost earning capacity, pain and suffering, and maintenance and cure for a seaman. The total depends on the facts, so no honest lawyer can promise a number up front.
What is maintenance and cure?
Maintenance and cure is a no-fault maritime benefit owed to an injured seaman: maintenance covers daily living expenses and cure covers medical care, until you reach maximum medical improvement, regardless of who was at fault.
What should you do after an injury on an offshore supply or service vessel?
Get medical care and make sure the injury is reported in writing. Preserve evidence early, including incident reports, photos, equipment, and witness names, and do not give a recorded statement or sign anything before talking to a lawyer.
What happens when you text us
Tell us what happened — in your own words, as much or as little as you want.
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Reach out even if…
- You think the accident was partly your fault — under the Jones Act, your own fault reduces a recovery but does not bar it.
- You already gave a statement or signed something — a release signed under pressure can be challenged.
- You still work for the company — talking to a lawyer is confidential, and retaliation for pursuing a claim can itself be actionable.
- You’re not sure your case is “big enough” — that’s exactly what a free review is for.
What you were working on shapes your claim.
Doyle Dennis Avery LLP represents offshore workers injured on drillships, semi-submersibles, jack-ups, FPSOs, platforms, and the supply, service, and construction vessels that serve them. Tell us what you were on and what happened — a case review costs nothing, and there is no obligation.
This page is general information, not legal advice, and does not create an attorney-client relationship. Whether a worker is a Jones Act seaman, an LHWCA harbor worker with a § 905(b) claim, or covered another way depends on the specific facts, including the structure involved and the worker’s connection to it. Vessel status and seaman status are fact-intensive questions. Prior results do not guarantee or predict a similar outcome. Doyle Dennis Avery LLP · Houston, Texas. This is attorney advertising.
