Merchant Marine & Commercial Ship Asbestos Exposure

Commercial Ship Types and Asbestos Risk

Commercial maritime asbestos exposure mirrored naval exposure almost exactly, because both drew on the same insulation products from the same manufacturers installed by the same shipyard trades. The decisive factor was propulsion: steam-powered vessels were heavily insulated throughout; diesel-powered vessels had lower but still significant insulation loads. The following table covers the principal commercial vessel types that generated documented asbestos exposure:

The Liberty Ship Program — 2,700 Floating Asbestos Hazards

Henry Kaiser’s Liberty ship program was one of the defining industrial achievements of World War II. At peak production, American yards were completing a new Liberty ship every 10 days — a manufacturing velocity that would have seemed impossible before the war. But every single one of those 2,710 Liberty ships was insulated throughout with the same asbestos-laden materials that made them efficient: 85% magnesia pipe covering on every steam line, asbestos block insulation on boiler casings and steam drums, asbestos-containing gaskets on every flange throughout the steam distribution system.

The Kaiser yards — particularly the Richmond Shipyard complex in Richmond, California, which at its peak employed 90,000 workers — were among the largest single point-sources of occupational asbestos exposure in American history. Workers at Richmond, at Bethlehem’s Fore River yard in Quincy, at the Southeastern Shipbuilding facility in Savannah, at the Todd Shipyards in Baltimore, and at dozens of other Liberty ship construction sites accumulated exposure during the construction phase that has since produced mesothelioma diagnoses in those workers and their families.

The mariners who crewed the Liberty ships compounded their exposure by spending months at a time aboard vessels whose engineering spaces were densely insulated with asbestos. Engineers, oilers, firemen, and wipers who worked in Liberty ship engine rooms and boiler rooms throughout the war years, and who continued sailing on Liberty ships repurposed as commercial freighters through the 1950s and into the 1960s, accumulated lifetime asbestos doses that their descendants are still navigating through the legal system today.

Engine Room Exposure on Commercial Vessels

The merchant mariner’s primary asbestos exposure environment was the engine room — the compartment that drove the ship and that was, on any pre-1975 steam-powered commercial vessel, saturated with asbestos insulation from deck plates to overhead. Steam engine rooms on commercial vessels were virtually identical in construction and insulation to Navy ships, because both drew from the same engineering traditions and the same pool of insulation products.

The engine room watch schedule meant sustained, repeated exposure. Merchant mariners typically stood four-hours-on, eight-hours-off watch rotations throughout a voyage. For a chief engineer, first assistant, second assistant, third assistant, oiler, wiper, or fireman, that meant four hours in the engine room, eight hours off (often in berthing with overhead pipe runs), then four more hours back in the engine room — repeated for the duration of a voyage that might last weeks or months. This schedule accumulated exposure faster than almost any shoreside occupation.

Maintenance and repair work generated the most intense acute exposures. Replacing valve packing — a routine maintenance task performed regularly on all steam systems — involved removing compressed asbestos sheet packing from valve stems and flanges throughout the plant. Cutting or breaking old pipe insulation to access a fitting, replacing deteriorated lagging on a steam line, grinding or fitting gaskets — each of these tasks released fiber concentrations far above those generated during ordinary watch-keeping. Engine room crew who performed maintenance duties in addition to watch-standing accumulated the highest total exposures.

On supertankers and Very Large Crude Carriers (VLCCs) of the 1960s and early 1970s, the engineering space could span six to eight decks. The main turbines, reduction gears, boilers, and all associated steam distribution systems occupied an enormous volume — all of it insulated. The sheer scale of insulation work required on these vessels, and the number of people working within them, made VLCC engine rooms among the most significant late-era asbestos exposure environments in commercial shipping.

Jones Act Claims for Merchant Mariners

The Jones Act is the primary federal legal remedy for merchant seamen injured through employer negligence. Understanding how it applies in asbestos mesothelioma cases is essential for any commercial mariner evaluating their legal options:

Jones Act Negligence (46 U.S.C. § 30104)

The Jones Act gives seamen the right to sue their employer for personal injury caused by the employer’s negligence. In a maritime asbestos case, a vessel owner or operator who exposed crew members to asbestos-insulated systems without adequate warning, without providing respiratory protection, or without informing workers of the known hazard may be found negligent under this standard. The Jones Act’s negligence standard is more favorable to injured workers than ordinary tort law — a seaman need only show that the employer’s negligence contributed, even slightly, to their injury.

Unseaworthiness Claims

Separate from Jones Act negligence, vessel owners owe crew members an absolute duty to provide a seaworthy vessel. A vessel is unseaworthy when it or its equipment is not reasonably fit for its intended purpose. Courts have recognized that a vessel whose crew members are exposed to hazardous asbestos insulation without adequate protection may be considered unseaworthy. Unseaworthiness is a strict liability claim — it does not require proof of negligence, only proof that the condition existed and caused injury.

Longshore and Harbor Workers’ Compensation Act (LHWCA)

Dockworkers, ship repairers, and some shoreside maritime workers who do not qualify as “seamen” under the Jones Act may have claims under the LHWCA, a federal workers’ compensation statute that provides scheduled benefits for maritime workers injured in the course of employment.

Asbestos Trust Fund Claims

Jones Act and unseaworthiness claims run against the vessel owner and operator. Asbestos trust fund claims run against the manufacturers of the insulation products themselves — entirely separate defendants. A commercial mariner with mesothelioma may have Jones Act claims against former employers and trust fund claims against Owens Corning, Pittsburgh Corning, Babcock & Wilcox, Philip Carey, and others simultaneously. These claims do not cancel each other out; both channels can be pursued at the same time, and total recovery is frequently higher when both are worked together.

Maritime Law and Federal Admiralty Jurisdiction

Claims arising from exposure at sea are governed by federal admiralty law, which differs from state law in significant ways: statutes of limitation are different, the available damages may differ, and the procedural rules for bringing a claim may vary. If your asbestos exposure occurred aboard a vessel on navigable waters, the maritime law framework likely applies. This makes specialist maritime asbestos counsel critical — a general personal injury attorney may not be familiar with the admiralty rules that can significantly affect your claim’s outcome.

WWII Merchant Mariners — A Long-Delayed Recognition

Of all the groups harmed by maritime asbestos exposure, WWII merchant mariners had perhaps the most difficult path to any form of recognition. During the war, these men sailed unarmed cargo ships across U-boat-infested Atlantic shipping lanes, delivering the fuel, ammunition, food, and materiel that sustained Allied forces. By one measure, the proportional casualty rate for WWII merchant mariners exceeded that of any branch of the armed forces — approximately one in twenty-six mariners who sailed during the war died as a result of enemy action.

Despite this sacrifice, Congress repeatedly denied merchant mariners veteran status for four decades after the war. The Armed Services viewed the merchant marine as a civilian commercial enterprise; the maritime industry had no political constituency comparable to the veterans’ lobby; and the men themselves — scattered across the country, working in a transient industry — had no organized voice. The benefits that Navy veterans received automatically — the GI Bill, VA healthcare, VA disability — passed these men entirely by.

It was not until 1988 that Congress finally passed legislation granting WWII merchant mariners veteran status under the Merchant Marine Act, opening a pathway to some VA benefits for survivors. By that time, many of the men most severely harmed during the war were already in their 60s and 70s, many with declining health from asbestos-related disease accumulated in those wartime Liberty ship engine rooms. Those who survived long enough to file claims, and their surviving families, can access some VA benefit programs today through a process administered through the Maritime Administration (MARAD).

Post-WWII commercial mariners — those who sailed on tankers, freighters, and bulk carriers through the 1950s, 1960s, and 1970s — remain outside the VA system entirely. Their path to compensation runs exclusively through Jones Act claims and asbestos trust fund claims against the manufacturers who produced the insulation that filled their engine rooms.

Great Lakes Commercial Shipping

Inland maritime exposure is a category frequently overlooked in discussions of maritime asbestos exposure, but Great Lakes shipping represents one of the most significant concentrations of steam-powered commercial vessels in American history. The Great Lakes fleet — the bulk carriers hauling iron ore from Minnesota’s Iron Range to steel mills in Detroit, Cleveland, Gary, and Pittsburgh — operated with steam propulsion through the 1970s, and the engineering spaces on these vessels were insulated to the same standard as any ocean-going ship.

Companies operating major Great Lakes fleets during the peak exposure era included the U.S. Steel Great Lakes Fleet (later USS Great Lakes Fleet), the Inland Steel fleet, the Bethlehem Steel Transportation Company fleet, Interlake Steamship Company, and Columbia Transportation (a division of Oglebay Norton). These were large corporate fleets operating dozens of vessels each, and the engineers, oilers, and firemen who crewed them accumulated career-long asbestos exposure as significant as that of any ocean-going mariner.

Great Lakes mariners have the same legal claims available to them as ocean-going mariners: Jones Act negligence claims against vessel operators, unseaworthiness claims, and asbestos trust fund claims against the product manufacturers. Federal admiralty jurisdiction applies to Great Lakes shipping under the Lakes Carriers’ Association rules, and maritime law governs employment relationships in this fleet the same as it does for saltwater shipping. An attorney familiar with Great Lakes maritime asbestos cases is important — the applicable law is the same as ocean shipping, but the specific vessel records and employer defendants are different.

Passenger Ship Asbestos Exposure

The great passenger liners of the postwar era — the SS United States (the fastest ocean liner ever built), the SS America, the SS Independence, and the dozens of foreign-flag vessels that called regularly at American ports — were steam-turbine powered and insulated throughout with conventional asbestos materials in their engineering spaces. Below-decks crew — engineers, engine room ratings, and maintenance workers — on these vessels accumulated the same type of exposure as their counterparts on cargo ships.

The SS United States, built in 1952 at Newport News Shipbuilding and operated by United States Lines, is a particularly well-documented case. The vessel was designed by William Francis Gibbs, who famously insisted on fireproof construction throughout — which in 1952 meant asbestos. Estimates from later abatement surveys put the vessel’s asbestos content at approximately 500,000 pounds. The ship is currently laid up in Philadelphia, and its extraordinary asbestos content has been a complicating factor in every proposed restoration or conversion project. Crew members who served aboard the United States during its operating life from 1952 to 1969 were exposed to significant asbestos throughout their service.

Foreign-flag passenger ships that called at U.S. ports also present exposure claims in some cases. If the exposure occurred in U.S. waters or in U.S. ports, or if the employer or vessel owner had sufficient U.S. nexus, American maritime law and American trust fund claims may be available even for crew members of foreign-flag vessels. This is a complex jurisdictional area requiring specialist maritime counsel.

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