Construction and support vessels are vessels — and they put two workforces on one deck.
The vessels that install platforms, lay pipe, and set subsea equipment are floating heavy industry. Their marine crews are seamen; the many contractors working alongside them often have a separate vessel-negligence claim.
Is an offshore construction vessel a vessel, and am I a Jones Act seaman on it?
Generally yes. A construction or support vessel is built to operate and move on the water, 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 construction 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.
Floating heavy industry.
Heavy-lift vessels and derrick barges install platforms, modules, and subsea structures; pipe-laying vessels lay pipelines and umbilicals; ROV support vessels run remotely-operated vehicles for subsea work; and survey vessels map and inspect. They are large, purpose-built vessels working some of the most demanding operations offshore.
Two workforces share the deck: the vessel's own marine crew — Jones Act seamen — and large numbers of construction and specialty contractors (riggers, welders, ROV crews, surveyors, dive teams) who are aboard for the project. Which one a worker belonged to changes the claim.
The injuries this work produces.
Heavy lifting is the defining hazard — crane and rigging operations, load handling, and dropped objects during installation. Pipe-laying adds tensioner and stinger operations; ROV and dive work add subsea and launch-and-recovery dangers; and all of it carries the usual falls, crush, and marine hazards of a working vessel. When a multi-ton lift or a tensioned line fails, the consequences are rarely minor.
Vessels — seaman claims and § 905(b) claims.
Under Stewart v. Dutra Construction Co., 543 U.S. 481 (2005), any watercraft practically capable of moving on water is a “vessel” — and a construction or support vessel qualifies. That status is the gateway to the strongest remedies in maritime law.
A worker assigned to the construction or support 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 construction vessel, the marine crew sues under the Jones Act and the contractors sue the vessel under § 905(b) — sorting out which is which is the first job.
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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.
Construction-vessel crews are seamen, so the fight is over fault, the lift plan, and the size of the loss.
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.
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.
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.
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 construction-vessel case turns on the lift and the plan.
Heavy lift, subsea construction, pipelay, ROV and diving support, and dynamic positioning are demanding operations where the lift plan, the rigging, and the exclusion zone decide safety. The firm reconstructs exactly how a body got into the line of fire and uses a marine-safety expert to show the safe method that was skipped, with the lift plan, rigging records, and DP logs carrying the Jones Act and unseaworthy case. The damages reflect the catastrophic injuries heavy-construction work produces.
On a construction vessel, almost every serious injury is a lift or a subsea task that should have been planned to keep people clear.
What to protect while it still exists.
The lift plan, the rigging, and the operation’s records are the case — and they are quickly re-rigged or overwritten.
Preserve the lift plan, rigging, DP and crane logs, the JSA, and the equipment involved, and identify every contractor on the job. These records prove the safe method that was skipped.
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 construction vessel injury claims
Is an offshore construction vessel a vessel?
Generally yes. A construction or support vessel is built to operate and move on the water, so courts usually treat it as a vessel for Jones Act purposes.
Am I a Jones Act seaman if I work on an offshore construction vessel?
Usually. If you have a substantial connection to an offshore construction 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 construction 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 construction 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.
