1. What "offshore injury" actually means and why it is legally complex
An offshore injury is any work-related injury that happens on a fixed offshore platform, a mobile offshore drilling unit (MODU), a drillship, an FPSO, a lift boat, a supply vessel, a helicopter in offshore transport, or an offshore wind installation. The legal complexity is that up to four different federal frameworks may apply (Jones Act, LHWCA via OCSLA, general maritime law, and sometimes state law), and the right framework is rarely obvious from the injury alone.
The phrase "offshore injury" is a workplace description, not a legal category. Two workers can sit next to each other on the same rig, get hurt by the same equipment failure, and end up with cases governed by completely different bodies of law. One might recover three or four times more than the other. That is not a fluke or a quirk. It is the structure of federal maritime law.
Offshore work happens at the seam of several legal traditions that were never written to fit together. Admiralty law dates to the founding. The Jones Act came in 1920. The LHWCA followed in 1927. OCSLA was passed in 1953 to extend federal authority over the outer continental shelf when oil and gas drilling moved out there. General maritime law fills the gaps. State law sometimes reaches into offshore work near the coast. None of these statutes was designed with the modern offshore industry in mind, and the courts have spent decades patching the seams.
Bottom line: "Offshore injury" is a workplace term, not a legal category. Your actual case can fall under any of four federal frameworks. Which one applies determines who you can sue, what damages you can recover, and how much your case is worth. The first job of an offshore injury lawyer is framework triage.
Why offshore cases are not "just maritime cases"
Most general personal injury lawyers, and even many maritime lawyers, treat offshore cases as routine Jones Act or LHWCA matters. That is a mistake. Offshore cases have a fact pattern that creates legal complexity:
- Multi-employer worksites. A typical drilling rig has the operator (the oil and gas company that owns the lease), the drilling contractor (which owns and crews the rig), and several service contractors (mud, cementing, wireline, casing, ROV). You probably work for one of those companies but get supervised by another, and your injury might be caused by a third. Each has its own insurance and legal status.
- Borrowed servant fights. Under maritime law, you can sometimes be legally considered the "borrowed servant" of a company you do not technically work for. That decides who is your "employer" for liability purposes. The wrong answer changes who you can sue.
- Jurisdictional fragmentation. An injury 12 miles offshore in the Gulf of Mexico might be governed by OCSLA, which then borrows from the LHWCA, which then borrows from adjacent state law as "surrogate federal law." A different injury on the same rig but on a piece of equipment supplied from a passing vessel might be Jones Act or general maritime negligence instead.
- Day-rate economics. Offshore workers commonly earn $600 to $1,500+ per day on hitch, then nothing on rotation. Standard lost-wages calculations built for W-2 employees with steady weekly checks badly understate offshore cases.
- Federal court venues. The bulk of serious offshore cases are filed in federal courts in Houston, New Orleans, and Lafayette, where judges and juries have heard offshore cases for forty years. Forum mechanics matter.
"The submerged lands of the outer continental shelf appertain to the United States and are subject to its jurisdiction, control, and power of disposition... The laws of each adjacent state... are declared to be the law of the United States for that portion of the subsoil and seabed of the outer Continental Shelf, and artificial islands and fixed structures erected thereon."
43 U.S.C. § 1333: Outer Continental Shelf Lands Act, jurisdiction and applicable law
What this guide does and what it does not do
This guide is the framework triage you should have on the first call with a lawyer. It covers what offshore injury actually means, which laws may apply to your specific facility and job, the doctrines that decide who you can sue, and how to tell whether a lawyer actually handles offshore cases at the level your facts require. It does not replace a consultation with a specialty lawyer. It gives you the vocabulary and the right questions.
For the deep legal mechanics of each framework, this guide links out to the dedicated pillars: Jones Act Claims for seamen and vessel-based crew, and LHWCA Claims for non-seamen including OCSLA-covered platform workers. The strategy of this site is that you triage here, then go deeper into the specific framework that fits your case.
If you were hurt offshore, the question is not "do I have a case." You probably have a case. The question is which body of federal law actually governs it, because the wrong answer can shrink your recovery by hundreds of thousands of dollars. The framework triage in the next few sections is the most important read of your case.
2. The three or four legal frameworks that may apply
Offshore injury cases generally fall under one of four frameworks: the Jones Act (for seamen with a vessel connection), LHWCA via OCSLA (for non-seamen on fixed platforms in federal waters), general maritime law (which adds doctrines like unseaworthiness and maintenance and cure), and sometimes state law (for inshore work, state-water facilities, or specific tort claims). Many serious offshore cases plead in the alternative under more than one framework.
Think of these four as overlapping circles. Your case usually sits inside one circle and not the others, but a few cases sit at intersections where two or three frameworks have something to say. A specialty lawyer figures out which circle (or circles) you are in before doing anything else, because the answer drives every decision after that, from who to sue to where to file to what damages to ask for.
Seamen
Jones Act
Negligence claim by a "seaman" against the employer. Requires a substantial connection to a vessel in navigation. Drillships, MODUs, lift boats, and certain rigs may qualify. Three-year statute of limitations. Trial by jury available.
Non-seamen on platforms
LHWCA via OCSLA
Federal workers compensation for non-seamen working on fixed offshore platforms in federal waters. No-fault benefits plus a possible Section 905(b) third-party negligence lawsuit against vessel owners. Strict notice and filing deadlines.
Maritime doctrine
General Maritime Law
Federal common law of the sea. Provides unseaworthiness claims, maintenance and cure, and a body of doctrine that fills gaps in the statutes. Often layered onto Jones Act or LHWCA cases.
Specific gaps
State Law
May apply to injuries in state waters, fixed structures in state waters, certain product liability claims against manufacturers, and DOHSA-adjacent wrongful death situations. Borrowed by OCSLA as surrogate federal law in some cases.
How a lawyer decides which framework fits
The first questions a specialty lawyer asks are not about your injury. They are about your worksite and your job:
- What kind of facility were you on? Fixed platform, MODU, drillship, lift boat, supply vessel, helicopter, wind installation vessel. Each pulls toward different frameworks.
- Where exactly was the facility located? State waters, federal waters of the outer continental shelf, or beyond U.S. jurisdiction. Distance from shore and the geological line under the seabed both matter.
- Who employed you on paper? Drilling contractor, service company, staffing company, operator. The borrowed servant doctrine can shift this answer.
- What was your job and how was your time spent? The Jones Act seaman test asks whether you contributed to a vessel's function and had a substantial connection to it in duration and nature. That is a fact-intensive question.
- Who caused the injury and how? Your employer, a co-employee, the operator, a vessel owner, a manufacturer, a third party. The answer expands or shrinks the menu of defendants.
The Jones Act seaman test requires that a worker contribute to the function of a vessel in navigation and have a connection to that vessel (or identifiable group of vessels) that is substantial in both duration and nature. A worker who spent less than 30 percent of his time at sea was generally not a seaman.
Chandris, Inc. v. Latsis
515 U.S. 347 (1995) · U.S. Supreme Court
Why this decides your case value
The frameworks pay differently because they are built differently. The Jones Act gives a seaman a negligence claim with pain-and-suffering damages and a jury. LHWCA gives a non-seaman no-fault benefits that are capped and structured. OCSLA extends LHWCA-style benefits to certain platform workers. General maritime law layers in unseaworthiness, which can be much easier to prove than negligence in some cases. The Section 905(b) action in LHWCA cases preserves a negligence claim against vessel owners separately.
Two examples to make this concrete. A roustabout hurt on a jack-up rig that the courts later decide is a Jones Act "vessel" may recover lost wages, lost earning capacity, medical expenses, pain and suffering, and possibly punitive damages if maintenance and cure was willfully withheld. The same roustabout, if the court decides the rig is a "fixed structure" under OCSLA, gets LHWCA workers comp benefits capped at two-thirds of average weekly wage, plus a possible 905(b) negligence claim against a vessel that supplied the rig. Same accident. Sometimes the same injury. Very different recovery.
Bottom line: Framework triage is the first thirty minutes of your case. A specialty lawyer asks about your facility, your job, your time on the water, and your employer paperwork. From that, they figure out which framework applies and start the next set of decisions. A generalist treats it as a routine workers comp or routine personal injury case and locks in the wrong path.
3. Types of offshore facilities and which laws apply to each
Every offshore worksite has a legal personality. The same general principles that decide whether a worker is a seaman or a non-seaman apply to facilities. The threshold question for the facility is whether it is a "vessel" within the meaning of maritime law. That single classification often controls everything else.
Fixed platforms
Pile-supported steel platforms permanently affixed to the seabed. Typically OCSLA / LHWCA framework if in federal outer continental shelf waters. Not vessels.
Jack-up rigs (MODUs)
Mobile offshore drilling units with legs that extend to the seafloor. Vessel status often debated; some courts treat them as vessels, others as fixed structures while jacked up.
Semi-submersibles
Floating drilling rigs supported by submerged pontoons, dynamically positioned or anchored. Generally vessels. Crew usually Jones Act seamen.
Drillships
Self-propelled drilling vessels. Clear vessel status. Crew working aboard with substantial connection are typically Jones Act seamen.
FPSOs
Floating Production, Storage, and Offloading units. Vessel-or-platform status is fact-specific and contested in some cases. Often built on converted tankers.
Lift boats
Self-elevating service vessels with extendable legs. Used for shallow-water work and increasingly for wind installation. Often vessels under Stewart analysis.
Supply and crew boats
Offshore supply vessels, fast crew boats, anchor handlers, tugs. Clear vessel status. Crews are seamen if they have a substantial vessel connection.
Helicopters
Offshore transport helicopters. Not maritime "vessels" but injuries during offshore transport often integrate into the offshore case under various theories.
Wind installations
Offshore wind turbines, foundations, monopiles, and the WTIVs that build them. Emerging legal area with limited case law. Framework decisions being made right now.
The "vessel" question that controls everything
For Jones Act and general maritime law purposes, a facility is a "vessel" if it is a "watercraft or other artificial contrivance used, or capable of being used, as a means of transportation on water." That is the definition from 1 U.S.C. § 3. The Supreme Court applied it to a dredge in Stewart v. Dutra Construction (2005), holding that even a watercraft with limited mobility could qualify as a vessel if it was practically capable of being used for transportation. The Court tightened the standard in Lozman v. City of Riviera Beach (2013), excluding floating homes and similar structures that were not actually used for transportation.
A watercraft is a vessel if it is "practically capable of being used as a means of transportation on water." Even a dredge with limited mobility qualified. The standard is functional capability, not whether the craft is in motion at any given time.
Stewart v. Dutra Construction Co.
543 U.S. 481 (2005) · U.S. Supreme Court
Most offshore facility classifications are settled at the extremes. Fixed steel platforms with pile foundations are not vessels. Drillships and supply boats are vessels. The contested middle is jack-up rigs, semi-submersibles in some configurations, FPSOs, and emerging classes like wind installation vessels. The classification is fact-intensive and matters because it can be the difference between Jones Act recovery and LHWCA workers comp.
Why facility type drives framework
Once the vessel question is resolved, the framework usually follows. If your facility is a vessel and you have a substantial connection to it, you are likely a seaman and your case is Jones Act. If your facility is a fixed structure in federal outer continental shelf waters, you are likely OCSLA / LHWCA. If your facility is fixed but in state waters, you may be in state workers comp territory. If you got hurt because of equipment supplied by a passing vessel while you were working on a fixed platform, you might be LHWCA for benefits and have a Section 905(b) lawsuit against the vessel owner on top.
Example scenario
A roustabout works on a jack-up rig that drills in the Gulf of Mexico, 60 miles offshore. While the rig is jacked up and drilling, a wireline winch malfunctions and crushes his hand. The legal question: is the jack-up rig a "vessel" under Stewart, or is it a "fixed structure" under OCSLA while jacked up? Courts have gone both ways. A specialty lawyer pleads both frameworks and litigates the classification through expert testimony about the rig's design and operational history.
Example scenario
A welder works aboard a drillship operating 200 miles offshore in the U.S. Gulf. He spends nearly all of his hitch on the drillship and is part of the crew. He falls down a ladder and breaks his back. The drillship is plainly a vessel. He has a substantial connection to it. He is almost certainly a Jones Act seaman. His case is Jones Act, with general maritime law layered on for unseaworthiness and maintenance and cure.
Bottom line: The kind of facility you worked on starts the framework analysis. Fixed platforms in federal waters: usually OCSLA / LHWCA. Drillships, supply boats, semi-submersibles: usually Jones Act for crews. Jack-ups, FPSOs, lift boats, wind installations: case-specific. A specialty lawyer pleads in the alternative when the classification is contested.
4. The OCSLA framework: outer continental shelf jurisdiction
The Outer Continental Shelf Lands Act (43 U.S.C. §§ 1331 to 1356b) extends federal jurisdiction to fixed structures on the outer continental shelf, generally federal waters beyond three nautical miles from shore. OCSLA adopts the LHWCA as the workers compensation framework for injured workers on those structures, and adopts adjacent state law as surrogate federal law to fill gaps.
OCSLA was passed in 1953 to settle a long-running fight about who controls the seabed beyond state waters. Coastal states wanted the resource revenue from offshore oil and gas. The federal government wanted federal control. Congress decided that the United States has paramount rights to the outer continental shelf, but to keep things workable it borrowed the legal regimes of the adjacent states. So Texas law applies as federal law to fixed structures off the Texas coast, Louisiana law to fixed structures off Louisiana, and so on.
What OCSLA actually does
OCSLA does four big things for offshore injury law:
- Extends federal jurisdiction to fixed structures on the outer continental shelf. Federal law governs, not state.
- Adopts the LHWCA as the workers compensation framework. Workers injured on covered fixed structures get LHWCA benefits the same as a longshore worker on a dock would.
- Borrows adjacent state law as surrogate federal law for issues the federal statutes do not address. That is how state product liability, state negligence doctrines, and state-law remedies get into OCSLA cases through the back door.
- Preserves the maritime framework for vessels operating near or supplying the fixed structures. A worker injured by a passing supply vessel may have a Section 905(b) action even though their employer-side claim is OCSLA / LHWCA.
"With respect to disability or death of an employee resulting from any injury occurring as the result of operations conducted on the outer Continental Shelf for the purpose of exploring for, developing, removing, or transporting by pipeline the natural resources... of the subsoil and seabed of the outer Continental Shelf, compensation shall be payable under the provisions of the Longshore and Harbor Workers Compensation Act."
43 U.S.C. § 1333(b): OCSLA, applicability of LHWCA
The Valladolid situs question
For decades, courts split over how connected an injury had to be to OCS operations to trigger OCSLA coverage. Some required injury "on" the outer continental shelf itself. Others applied a "but for" test (would the injury have occurred but for the OCS operations). The Supreme Court resolved the split in Pacific Operators Offshore, LLP v. Valladolid (2012), adopting a "substantial nexus" test: there must be a substantial nexus between the injury and the OCS operations, but the injury does not have to occur physically on the shelf itself.
An injured worker need not be physically present on the outer continental shelf at the moment of injury to qualify for OCSLA coverage. A "substantial nexus" between the injury and OCS operations is sufficient. A roustabout killed at an onshore facility that processed OCS oil was covered.
Pacific Operators Offshore, LLP v. Valladolid
565 U.S. 207 (2012) · U.S. Supreme Court
The practical effect of Valladolid is that the federal coverage net is wider than it used to be. Workers whose work serves the outer continental shelf operations, even if their immediate worksite is on land or in state waters, may be OCSLA-covered. That is good news for workers and a meaningful expansion of LHWCA benefits.
Surrogate state law: the back door
One of the most important and confusing features of OCSLA is the borrowing of adjacent state law as federal law. Under 43 U.S.C. § 1333(a)(2)(A), the laws of the adjacent state apply to the fixed structures of the outer continental shelf "to the extent that they are applicable and not inconsistent with this subchapter or with other Federal laws and regulations." Translation: state law applies as federal law to fill gaps.
This matters because state law often gives broader product liability remedies, broader negligence remedies, and broader damages categories than federal maritime law. A worker injured by defective equipment on a fixed platform off Louisiana, for example, may have a Louisiana product liability claim that gets adopted into the federal OCSLA case. The Fifth Circuit has spent decades working out which state laws are "applicable and not inconsistent." The case law is dense and a real specialty area.
What OCSLA does not cover
OCSLA does not cover everything in offshore work. Its main limits:
- State waters. Generally OCSLA applies beyond three nautical miles (the line varies for Florida and Texas). Inside the three-mile zone, state law applies directly, not as surrogate federal law.
- Vessels. OCSLA covers fixed structures. Floating drilling rigs and drillships are vessels, governed by Jones Act and general maritime law for their crews.
- Seamen. A Jones Act seaman is not OCSLA-covered. The two are mutually exclusive. The classification fight matters.
- Non-OCS operations. Work that does not have a substantial nexus to outer continental shelf operations falls outside OCSLA. The Valladolid nexus test is wide but not unlimited.
Why OCSLA cases need a specialty lawyer
OCSLA cases involve federal jurisdiction, LHWCA workers compensation procedure, surrogate state law (different in Texas, Louisiana, Mississippi, Alabama, and Florida), the Valladolid nexus question, and frequently a parallel Section 905(b) third-party negligence claim against vessel owners. That is four legal regimes in one case. General workers comp lawyers do not know this map. Maritime lawyers without OCSLA volume struggle with the surrogate state law analysis. A specialty offshore practice handles these as routine.
OCSLA is the legal backbone of offshore oil and gas worker injury claims. It pulls in LHWCA for the workers comp piece, pulls in adjacent state law for the gaps, and lets you sue vessel owners separately under Section 905(b) when a vessel's negligence caused or contributed to your injury. It is a four-layer cake. A specialty lawyer assembles it; a generalist makes a mess.