Is maritime covered by OSHA when contractors and vessel crews work side by side? Yes, OSHA covers much of the work done in shipyards, marine terminals, and aboard vessels. But the agency responsible for a particular worker or hazard can change with the job, the vessel, and the location.
Picture a repair contractor boarding a ferry while its crew prepares for departure. Everyone is on the same vessel, yet different safety authorities may apply to their work. Crossing the gangway doesn’t settle the question.
At Illustra Pro, we want maritime workers and employers to understand that distinction before it becomes an issue during a job. Knowing who regulates the work helps you find the right requirements, assign responsibilities, and prepare crews for the hazards they actually face.
Does OSHA cover maritime work alongside the Coast Guard?
The Occupational Safety and Health Act gives OSHA broad authority over covered employment. However, Section 4(b)(1) limits that authority where another federal agency exercises legal power to regulate occupational safety and health.
That last part matters. Another agency having authority on paper doesn’t automatically remove OSHA from the picture.
The Supreme Court addressed this in Chao v. Mallard Bay Drilling, Inc. (2002). After an explosion aboard an uninspected drilling barge in Louisiana waters, the employer challenged OSHA’s citations, arguing that Coast Guard authority displaced OSHA entirely.
The Court rejected that argument. The Coast Guard had neither regulated the working conditions at issue nor exercised authority over working conditions on that class of vessel. OSHA could therefore act. The decision also confirmed that a vessel in state navigable waters could be a workplace under the Act.
When employers ask, “Does OSHA cover maritime work on our vessel?” the answer requires that same attention to the working conditions. For employers, the lesson is practical: identify the working conditions and the regulations that cover them. Saying “the Coast Guard handles our vessel” leaves too much unanswered.
Does OSHA apply to maritime crews on inspected vessels?
An inspected vessel is subject to the Coast Guard’s inspection and certification requirements. Its Certificate of Inspection helps establish the applicable category; a routine boarding or equipment check doesn’t make a vessel “inspected” in this legal sense.
Under OSHA’s agreement with the Coast Guard, the Coast Guard exercises comprehensive safety and health authority over seamen aboard inspected vessels. OSHA generally does not enforce its working condition standards for those crew members.
Does OSHA apply to maritime work on uninspected vessels? Those vessels require a closer look. Coast Guard rules still apply, and the rules differ among vessel categories. Commercial fishing vessels, for example, have requirements that go beyond the basic rules for other uninspected vessels.
Within OSHA’s geographic jurisdiction, OSHA can address working conditions that Coast Guard regulations have not displaced. Employers should check the applicable rule for an exposure rather than assume every hazard aboard an uninspected vessel falls under OSHA.
Recordkeeping is a separate question. Coast Guard regulation does not automatically remove OSHA injury and illness recordkeeping obligations on inspected or uninspected vessels.
A repair contractor isn’t automatically a crew member
A shipyard electrician can spend a shift aboard an inspected vessel without becoming part of its operating crew. OSHA generally retains authority over covered ship repair contractors and longshore employers working aboard those vessels.
This distinction explains why a vessel’s inspection status alone cannot answer every jurisdiction question. You also need to know who employs the worker and what work that person performs.
You may have heard that spending 30 percent of working time aboard a vessel makes someone a seaman. That figure comes from Jones Act decisions and serves as a guideline in that context. It isn’t a universal administrative test for OSHA coverage.
For a contractor planning repairs, the immediate questions are more useful: What tasks will the crew perform? Which employer controls them? Which standards govern the work? Our guide to controlling maritime electrical hazards examines one area that needs attention before repairs start.
Do OSHA standards cover maritime repair and cargo operations?
Do OSHA standards cover maritime operations under a single set of rules? The requirements are divided by the type of work. Once you’ve established OSHA coverage, choose the standards according to the operation. “Maritime” covers several kinds of work, each with different requirements.
Shipbuilding, repair, and shipbreaking fall under Part 1915. A repair team entering a tank needs to consider atmospheric testing and entry precautions. Our article on maritime confined space dangers explains why a space that looks empty can still be dangerous.
Hot work adds another decision. Certain locations require testing and certification by a Marine Chemist or Coast Guard-authorized person; others require competent person testing. The applicable conditions determine which route is required. Our maritime hot work permit guide provides further context. Planning also needs to address welding fumes and gases and the circumstances that trigger fire watch duties.
Part 1917** covers marine terminal operations.** It addresses work such as moving cargo through a waterfront terminal, including requirements for equipment and working areas. A terminal’s safety program needs to account for how vehicles and workers share the site, especially when visibility is limited.
Part 1918** covers longshoring operations aboard vessels.** Access, cargo handling, and open hatches bring different concerns from those on the dock. Employers should use the provisions that apply to their operation when planning maritime fall protection.
Cargo gear certification requirements also involve Part 1919. Certification doesn’t replace checks before use or sound decisions about a lift. Our safe rigging practices guide discusses the work around the equipment.
Commercial diving has its own requirements under Part 1910, Subpart T, with related provisions for maritime and construction work. Some diving operations fall under Coast Guard authority. Depth limits, chamber requirements, and exemptions depend on the operation, so no single rule of thumb covers every dive.
Federal OSHA or a state program?
An OSHA-approved State Plan doesn’t necessarily cover all maritime employment within that state. Federal OSHA retains much of this work, including activities on navigable waters.
California, Minnesota, Vermont, and Washington cover certain private sector shore operations in shipyards and marine terminals. The boundaries depend on each approved plan. State Plans also cover state and local government employees, who fall outside federal OSHA’s ordinary private-sector coverage.
A public ferry operator and a private repair business may therefore need different coverage answers, even when their employees work nearby. Check the relevant State Plan’s coverage description instead of relying on the state’s general workplace safety rules.
Foreign vessels bring another distinction. OSHA generally does not regulate the internal working conditions of foreign crews on foreign-flagged vessels. That doesn’t remove the protections for covered shoreside employees who board them in U.S. waters. A domestic repair contractor still needs to determine the OSHA requirements for its employees’ work, including access and entry into dangerous spaces. The ship’s flag alone doesn’t answer the contractor’s safety questions.
Make the answer usable before work starts
A useful jurisdiction review produces something the supervisor can use: the responsible employer, the applicable standards, and the controls required for the planned task.
Write those decisions into the job planning documents. If a contractor will enter a tank, identify who arranges testing and authorizes entry. If repairs introduce hot work, establish the required certifications and fire precautions before equipment arrives. Resolve questions about agency boundaries while there’s still time to adjust the plan.
For example, a crew arriving to weld near a fuel tank should know who has evaluated the space and whether the required certification is in place. A schedule change or a different work location can affect those arrangements. Supervisors need a way to review the change before the crew continues. Keep the relevant documents accessible to the people making that decision at the worksite.
Workers should know who can stop the job when these questions remain unresolved.
Training helps workers recognize when those arrangements are missing. At Illustra Pro, our OSHA 10 Hour Maritime course offers introductory hazard awareness, while our OSHA 30 Hour Maritime training provides more time for safety responsibilities.
OSHA Outreach training is generally voluntary under federal OSHA, although an employer may require it. It doesn’t replace training required by specific standards. Before booking, contact our team with the work your employees perform. We can help you choose an appropriate course as you establish the job requirements.