USCGC Mackinaw (WAGB-83) — Coast Guard Icebreaker Asbestos Exposure

USCGC Mackinaw (WAGB-83), the Great Lakes heavy icebreaker (Toledo, 1944–2006), preserved at Mackinaw City, MI. Asbestos aboard and the Coast Guard exposure record.

By Rights Watch Media Group LLC •August 18, 2026 • 2 min read

Hull

WAGB-83

Class

Great Lakes heavy icebreaker (WAGB)

Commissioned

1944

Decommissioned

2006

Built At

Toledo Shipbuilding Co., Toledo, OH

MusterLog™ 0

The USCGC Mackinaw (WAGB-83) — the “Mighty Mac” — was a Great Lakes heavy icebreaker built at Toledo, Ohio in 1944 and preserved today at Mackinaw City, Michigan. Built to keep wartime Great Lakes shipping lanes open, she served for 62 years before decommissioning in 2006.

Asbestos-Containing Materials Aboard the Mackinaw

Like other Great Lakes icebreakers of her era, the Mackinaw was built and maintained with asbestos-containing materials concentrated in her machinery spaces. Per public shipbuilding and litigation records, asbestos was allegedly used in materials of this construction era, including:

Engine-room and machinery lagging — insulation on the diesel engines, generators, and exhaust uptakes
Piping insulation — pipe covering and block insulation throughout the machinery spaces
Gaskets and packing — in fuel, lube-oil, cooling, and auxiliary systems
Thermal and hull insulation — extensive insulation typical of a cold-weather icebreaker
Bulkhead and overhead panel insulation in machinery and habitability spaces

These materials were most hazardous when disturbed during maintenance, repair, or overhaul — releasing airborne fibers into the enclosed machinery spaces where the crew worked.

Who Was Exposed Aboard the Mackinaw

As a diesel-electric icebreaker, Mackinaw carried extensive asbestos insulation on her diesel engines, generators, exhaust uptakes, and machinery piping — along with the heavy thermal and hull insulation typical of a cold-weather ship. Coast Guard engineering ratings who worked in the machinery spaces could disturb asbestos-containing lagging during watches, maintenance, and overhauls.

VA Benefits for Coast Guard Veterans

The U.S. Coast Guard is a branch of the armed forces, and Coast Guard sea service is qualifying military service for VA purposes. Coast Guard veterans diagnosed with mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease may qualify for VA disability compensation when the record shows in-service asbestos exposure, a current diagnosis, and a medical link between them.

Diagnosed with mesothelioma after exposure aboard the Mackinaw? Coast Guard veterans diagnosed with mesothelioma or another asbestos-related disease after exposure aboard the Mackinaw (WAGB-83) may be able to pursue a claim against the makers of the asbestos products used aboard. Speak with O’Brien Law Firm — (314) 237-6461

Documented asbestos records are derived from publicly filed asbestos litigation and public shipbuilding records addressing vessels of this construction era. RightsWatch Media is an independent publisher, not a law firm; this is not legal or medical advice.

The asbestos-containing products documented on U.S. Navy vessels and at shipyards are catalogued by manufacturer on AsbestosIndex. These records cross-reference which companies supplied which materials and to which facilities.

Pipe Covering & Block Insulation Thermal insulation applied to steam lines, valves, and equipment in engine rooms and fire rooms Marine Products Insulation, gaskets, and packing products specified for naval and commercial marine applications Boilers & Steam Equipment Boiler manufacturers and insulation products — central to the fire room exposure pathway Gaskets & Packing Sheet and ring gaskets used throughout piping flanges, valve bonnets, and pump housings Electrical Products Wire insulation, switchgear arc chutes, and panel liners used throughout electrical spaces Full Product Index Search all 200+ manufacturers and 1,500+ documented asbestos products on AsbestosIndex™

Documented Asbestos-Exposure Environments — U.S. Navy Service

Public-domain U.S. Navy photographs illustrating the engineering spaces, ratings, and yard environments where asbestos materials were routinely encountered during normal duty.

Boiler Room Sailor stands watch in the aft machinery room of USS Iwo Jima. (35298984822) Source: Wikimedia Commons (public domain)

Drydock Overhaul USS Newport News (CA-148) in drydock at the Norfolk Navy Yard 1965 Source: Wikimedia Commons (public domain)

Engine Room Flickr - Official U.S. Navy Imagery - USS Sterett Sailor takes equipment readings in ship's engine room. Source: Wikimedia Commons (public domain)

Engineering Watch USS Bataan Stands Full Female Engineering Watch Team (8442031) Source: Wikimedia Commons (public domain)

US Navy 061108-N-6652A-037 U.S. Navy Aviation Machinist's Mate 3rd Class Roy Hernandez, left, and Aviation Machinist's Mate Airman Jerry … — Machinist Mate US Navy 061108-N-6652A-037 U.S. Navy Aviation Machinist's Mate 3rd Class Roy Hernandez, left, and Aviation Machinist's Mate Airman Jerry Rivera work on a rotor … Source: Wikimedia Commons (public domain)

Navy Fireroom Fireroom aboard USS Rochester (CA-124), in 1955 Source: Wikimedia Commons (public domain)

US Navy 080208-N-6538W-019 Civilian yard workers from Puget Sound Naval Shipyard perform maintenance on the bow catapults of the … — Shipyard Worker US Navy 080208-N-6538W-019 Civilian yard workers from Puget Sound Naval Shipyard perform maintenance on the bow catapults of the Nimitz-class aircraft carrier … Source: Wikimedia Commons (public domain)

All images are public domain (U.S. Government works). Specific photographs depict generic Navy engineering and yard environments — not the named vessel above. Asbestos materials shown or implied include pipe lagging, boiler insulation, steam-line covering, and gasket / packing materials standard on U.S. Navy vessels through the early 1980s.

USCGC Mackinaw — WAGB-83 — Frequently Asked Questions

Are USCGC Mackinaw — WAGB-83 veterans covered by Navy asbestos litigation records?

Yes. USCGC Mackinaw — WAGB-83 is documented in the public U.S. Navy asbestos litigation record. U.S. Navy vessels of her service era were built to BUSHIPS specifications that required asbestos insulation throughout engineering spaces, on steam lines, around boilers and turbines, and in gasket and packing materials.

Which shipboard components on USCGC Mackinaw — WAGB-83 contained asbestos?

Asbestos-containing materials documented aboard U.S. Navy vessels of USCGC Mackinaw — WAGB-83's era include: boiler insulation and lagging, steam-line pipe insulation, turbine and reduction-gear casings, valve packing, gaskets, brake and clutch friction materials, electrical wire insulation, overhead pipe coverings in berthing and mess spaces, and Navy-issue boiler cement and refractory in fireboxes.

What ratings were exposed to asbestos serving on USCGC Mackinaw — WAGB-83?

Navy ratings with the highest documented asbestos exposure include Machinist's Mate (MM), Boiler Technician (BT), Hull Maintenance Technician (HT), Engineman (EN), Electrician's Mate (EM), Interior Communications Electrician (IC), Damage Controlman (DC), and Pipefitter / Shipfitter. Officers in engineering departments also encountered asbestos in normal duty. Shipyard workers performing overhaul, repair, or refit work had concentrated exposure during yard periods.

Do USCGC Mackinaw — WAGB-83 veterans qualify for VA disability for mesothelioma?

Potentially. VA evaluates asbestos-related disability claims individually. USCGC Mackinaw — WAGB-83 veterans generally need medical records showing the current disease, service records supporting in-service asbestos exposure, and a doctor's statement connecting the two. Veterans may file at VA.gov, call 1-800-827-1000, or seek free help from an accredited Veterans Service Organization such as DAV, VFW, or the American Legion.

Veterans' Firsthand Accounts

Were you aboard USCGC Mackinaw? Add your account.

No one knows this ship like the crew who ran her. If you served aboard, tell us what you remember — the spaces, the equipment, where the dust and lagging were, what the work was really like. Every firsthand account helps another USCGC Mackinaw veteran or family understand where they may have been exposed, and where to find help.

About these accounts: they are personal recollections shared by veterans and their families — individual memory and experience, not archival records, and not independently verified. The ship's documented history, equipment manifest, and exposure record on this page are drawn from NARA, BUSHIPS, DANFS, and VA sources. These accounts sit alongside that documented record — they add to it, they don't change it.

Disclaimer: The information in this article is for general educational purposes only and does not constitute medical or legal advice. No attorney-client relationship is created by reading this site. References to ships, shipyards, companies, products, and asbestos-containing materials are drawn from public VA records, NARA archives, EPA/OSHA databases, and public litigation records. All references reflect what has been documented or alleged in publicly filed records. Consult a licensed physician for medical guidance and a qualified attorney for legal advice regarding your specific situation.

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Connect With a Navy Asbestos & Mesothelioma Attorney

Navy veterans and civilian shipyard workers diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer may have grounds for a civil claim against the asbestos product manufacturers whose materials were installed aboard. O'Brien Law Firm represents veterans and their families in the civil track at no upfront cost — separate from any VA disability benefits you may be eligible for.

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If you were diagnosed with an asbestos-related disease, a filing deadline may already be running. You may have a legal claim now — and claims can often be pursued even if the company is out of business.

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Surviving spouses and children may pursue a wrongful-death claim and asbestos-trust recovery on a loved one's behalf — a separate deadline that can run from the date of passing.

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Personal-injury and wrongful-death claims both evaluated
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Maritime statute of limitations: 3 years from diagnosis (46 U.S.C. § 30106)
Runs in parallel with VA benefits — civil recovery does not reduce VA disability compensation

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Civil mesothelioma & asbestos litigation — veterans and their families.

VA disability benefits are a separate government process. To file a VA disability claim for asbestos exposure, visit VA.gov › Hazardous Materials Exposure, call 1‑800‑827‑1000, or contact a Veterans Service Organization (DAV, VFW, American Legion) for free claim assistance.

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If you served aboard USS USCGC Mackinaw — WAGB-83 and have since been diagnosed with mesothelioma, asbestos-related lung cancer, or another asbestos disease after exposure to asbestos aboard ship, you may have a legal claim. Speak with O'Brien Law Firm — (314) 237-6461.

navyshipexposure.com is published by Rights Watch Media Group LLC, an independent publisher, and is sponsored by O'Brien Law Firm. This page is a public-records reference and is not legal or medical advice.