⚓ U.S. Navy — Minesweepers
Ability MSO-519
Last updated July 11, 2026
The Ability MSO-519 was a class of U.S. Navy minesweepers from the asbestos era, led by USS Ability (MSO-519). Its 3 ships used asbestos-containing insulation throughout the engineering plant, and veterans who served aboard Ability MSO-519 vessels — especially in engineering ratings — may have been exposed to asbestos fibers.
About the Ability MSO-519
- 3 ships in the class
- Hull numbers span MSO-519 to MSO-521
- Lead ship: USS Ability (MSO-519)
Asbestos Exposure Aboard Ability MSO-519 Ships
Asbestos was the standard thermal insulation material aboard U.S. Navy minesweepers built before approximately 1980. On ships of this type, asbestos-containing materials were concentrated in the areas below.
- Diesel engine exhaust system — manifold and pipe insulation
- Engine room pipe lagging and pump gaskets
- Electrical generator and motor insulation
- Valve packing throughout engineering spaces
The Aggressive class (MSO-422, commissioned 1952–1956) and subsequent MSOs served through the 1970s. Many were built with wood hulls over steel framing to reduce magnetic signature, but their propulsion plants still relied on asbestos-insulated components.
For the full minesweepers exposure overview, see the Minesweepers asbestos guide ›
At-Risk Ratings Aboard Ability MSO-519 Ships
The following ratings had regular contact with asbestos-containing materials aboard minesweepers of this era. If you served in one of these ratings, document it when filing a VA disability or asbestos trust fund claim.
Ships in the Ability MSO-519 (3 vessels)
| Ship Name | Hull No. | Notes |
|---|---|---|
| USS Ability | MSO-519 | |
| USS Alacrity | MSO-520 | |
| USS Assurance | MSO-521 |
VA Benefits & Legal Options for Ability MSO-519 Veterans
Veterans diagnosed with mesothelioma, asbestosis, pleural plaques, or asbestos-related lung cancer who served aboard Ability MSO-519 ships may be eligible for:
- VA disability compensation — monthly benefit; requires diagnosis plus evidence of shipboard service. No manufacturer identification needed.
- Asbestos trust fund claims — lump-sum payments from trusts funded by bankrupt asbestos manufacturers (Johns-Manville, Owens Corning, and others). Requires identifying specific products used aboard.
These two paths are not mutually exclusive. Many veterans pursue both.
Full claim guidance for Minesweepers › Free Legal Review ›
Asbestos.cam is an informational resource, not a law firm. The above is general information, not legal advice. Consult a qualified attorney for guidance on your specific situation.
Frequently Asked Questions
Did Ability MSO-519 ships use asbestos?
Yes. The Ability MSO-519 was built during the era when asbestos was the standard insulation material in U.S. naval construction. Engineering spaces aboard these vessels contained asbestos pipe lagging, boiler block insulation, gaskets, and valve packing. Veterans who worked in boiler rooms, engine rooms, or repair roles had the highest likelihood of exposure.
How do I prove I served aboard a Ability MSO-519 ship for a VA claim?
Your DD-214 (Certificate of Release or Discharge from Active Duty) lists your ship assignments. Additional documentation includes ship deck logs (available from the National Archives), official orders, and buddy statements from fellow crew members. A Veterans Service Organization (VSO) can help you gather and submit this evidence at no cost.
What asbestos products were used aboard Ability MSO-519 ships?
Common asbestos products used in U.S. Navy minesweepers of this era included Kaylo pipe insulation (Owens-Illinois), Unibestos block insulation (Pittsburgh Corning), 85% magnesia pipe covering (various manufacturers), Flexitallic spiral-wound gaskets, and Johns-Manville pipe covering. A mesothelioma attorney who specializes in Navy claims maintains detailed product-identification databases for specific ship classes.
Did You Serve Aboard Ability MSO-519?
If you or a family member served aboard Ability MSO-519, you may have been exposed to asbestos. Sharing your service information is completely voluntary and may help build the historical record of shipboard exposure — information that can be valuable in VA disability and asbestos trust fund claims.
What we do with your information: Your submission goes into a private moderation queue. We will never publish your name, contact details, or diagnosis information publicly. The only information that may appear publicly is an anonymized count of verified veterans who have reported serving on this ship. We will not sell, rent, or share your information with third parties except as necessary to respond to your specific request. You may request deletion of your information at any time.
To request that your information be removed: Data Removal Request ›