Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
-
[1]research packet 855-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-ability-mso519-pkt-855-packet-md
-
[2]DANFS, 'Ability II (MSO-519) 1958-1970' (NHHC; entry by Raymond A. Mann, 8 February 2016; page verified live 2026-10-03) [nhhc_danfs]
- Locator
- Full DANFS entry text; spec block
- Finding type
- vessel_history
- Finding
- Construction and full service history: laid down 5 March 1956 at Sturgeon Bay, Wis., by Peterson Builders, Inc.; launched 29 December 1956, sponsored by Mrs. Henry P. Williams; ferried to Boston via the Great Lakes and St. Lawrence River; fitted out at the Boston Naval Shipyard; commissioned there 4 August 1958, Lt. Cmdr. W. L. Hough in command. Spec block: displacement 934; length 190'; beam 36'; draft 12'; speed 15 knots; complement 83; armament one 40 mm, two .50-cal; class Ability. Service: MinRon 4 and MinDiv 45 out of Charleston, SC; flagship of MinDiv 85 from 1 July 1959; support to the Naval Mine Warfare School (Charleston), Naval Ordnance Laboratory Test Facility (Port Everglades, Fla.), and Naval Mine Defense Laboratory (Panama City, Fla.); Freedom 7 close-recovery vessel May 1961; Cuban quarantine Nov-Dec 1962 (Windward Passage patrol, then Guantanamo harbor defense); three Sixth Fleet Mediterranean deployments; February 1966 participation in the Palomares lost-bomb search; Expo '67 Montreal goodwill visit May-June 1967; Gemini 6/7 support December 1965. In June 1970 placed out of commission for extensive repairs and modifications at Todd Shipyards Corp., Brooklyn, NY; rehabilitation contract terminated 16 October 1970 under Department of the Navy force-level decisions; stricken from the Naval Vessel Register 1 February 1971; subsequently sold for scrapping.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1971
- Population
- Ship's company (complement 83); Peterson Builders construction trades (1956-58); Boston Naval Shipyard fitting-out trades (1958)
- Limitations
- Establishes identity, milestones, operating history, and the two documented yard events (Boston Naval Shipyard fitting out 1957-58; Todd Shipyards Brooklyn rehabilitation contract 1970). Contains no asbestos information whatsoever; does not establish materials aboard, individual exposure, or quantities. The 2016 DANFS revision dates the first Mediterranean deployment September 1963 - March 1964; older DANFS-derived texts carry September 1960 - March 1961 - conflict carried in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-01
-
[3]NavSource Online: Mine Warfare Vessel Photo Archive, 'Ability (MSO 519)' (page 11/02519, verified live on navsource.net 2026-10-03) [other_primary]
- Locator
- Header designation/milestones block; specifications block; commanding-officer table; photo captions
- Finding type
- vessel_history
- Finding
- Lead ship of the Ability class. Designation/milestone line: laid down 5 March 1956 by Peterson Builders, Inc., Sturgeon Bay, WI; launched 29 December 1956; commissioned USS Ability (MSO-519) 4 August 1958 at the Boston Navy Yard, Charlestown, MA; decommissioned June 1970; struck from the Navy Register 1 February 1971; sold for scrap 3 January 1972 to Union Minerals and Alloys of New York, NY, for $17,688. Specifications: displacement 934 t.; 190' x 36' x 12'; 15 kts; complement 83; one 40 mm mount, two .50-cal. Propulsion: two 1,400-hp General Motors 8-498 diesels, Falk 3:1 reduction gear, two shafts, Farrel-Birmingham controllable-pitch propellers; three 100-kW Delco generators on GM 6-71 diesels; 2,350-kW Westinghouse magnetic-sweep generator on one GM 8-489 diesel; 250-kW acoustic-sweep generator on one GM 8-268A diesel; one 2,000-gal/day Badger distilling plant; hotel steam from two 125-psi CycloTherm firetube boilers. Commanding-officer roster (8 COs, 1958-1970); photo captions include NH 96645 (underway near Charleston Naval Shipyard, 23 March 1959) and circa-1960 Mediterranean port photographs (Livorno July 1960, Nice September 1960) credited to CO Larry L. Hawkins (CO 29 April 1960 - 6 July 1962).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1972
- Population
- Ship's company (complement 83); eight commanding officers 1958-1970
- Limitations
- Milestone and equipment detail plus disposal buyer/price; contains no asbestos information and establishes no materials aboard. The circa-1960 Mediterranean photo captions conflict with the current DANFS dating of the first Mediterranean deployment (September 1963) - conflict carried in gaps. Page header misspells the name 'Abiity' (cosmetic).
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-02
-
[4]Historical Collections of the Great Lakes (Bowling Green State University), vessel record 'MSO-519 (USS ABILITY)' (item 437623, verified live 2026-10-03) [other_primary]
- Locator
- Registry/rig and dimensions table; vessel history; build information
- Finding type
- vessel_history
- Finding
- Great Lakes maritime archive record for this hull: hull material 'Wood'; builder Peterson Builders, Inc., Sturgeon Bay, WI; length 190.00, width 36.00, depth 12.00; stricken from Navy List February 1, 1971; U.S. Navy ownership 1958-1971.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1958-1971
- Limitations
- Confirms wooden-hull construction (consistent with the class's nonmagnetic design requirement) - an asbestos-relevant structural fact only in that it places exposure pathways on machinery, piping, and outfit materials rather than structure. Contains no asbestos information; establishes no materials aboard.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-03
-
[5]Era inference built on: DANFS spec block and service history; NavSource specifications (GM 8-498 main diesels, Delco and sweep generator sets, Badger distilling plant, two 125-psi CycloTherm firetube boilers for hotel steam); HCGL hull-material record (wood); GAO HRD-80-2 Navy asbestos-era documentation (see ev-05) [other_primary]
- Locator
- DANFS spec block; NavSource specifications block; HCGL build record; GAO HRD-80-2 product page
- Finding type
- asbestos_application
- Finding
- A Navy ocean minesweeper built 1956-58 sits inside the service's documented asbestos-use era (GAO HRD-80-2: asbestos insulation used aboard Navy ships, substitution of nonasbestos materials not begun until the early 1970s). Propulsion was diesel - no main steam plant - so the boiler/turbine lagging pathway of steam vessels does not apply; the asbestos-relevant systems aboard were the two small 125-psi CycloTherm firetube auxiliary ('hotel' steam) boilers, diesel machinery and exhaust lagging, piping insulation, gaskets, valve packing, electrical insulation, and brake linings on deck machinery - the era-standard small-combatant applications.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1956-1972
- Population
- Peterson Builders construction trades (1956-58); engine-room, auxiliary-machinery, and damage-control crews (1958-70); yard trades at fitting-out and 1970 rehabilitation events
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for MSO-519. Names era-standard applications aboard a vessel of this type and period, not confirmed installed materials. No quantity. The wooden hull narrows but does not eliminate the thermal-insulation pathway (auxiliary boilers and machinery remained). Does not establish individual exposure or present-day presence.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-04
-
[6]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979; product page verified live 2026-10-03) [gao]
- Locator
- GAO product page HRD-80-2, Highlights section
- Finding type
- gov_survey
- Finding
- GAO documented the Navy's asbestos-management posture covering this hull's entire construction and service era (1956-1971): the report reviewed the use of asbestos in Navy ships and the cost of removing it; the Navy's 1975 policy was to remove and replace with nonasbestos materials only insulation that was damaged or had to be removed for necessary repairs, modified in 1979 to selectively replace asbestos insulation in high-maintenance areas.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 (report); policy window 1975-1979
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull. GAO fieldwork yards were Long Beach and Norfolk Naval Shipyards - neither is among this hull's documented yards. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, confirmed 2026-10-03) - content via product-page Highlights. MSO-519 was stricken and sold before the policies described took effect.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-05
-
[7]NIOSH, 'Walk-through survey report, Peterson Builders, Inc., Sturgeon Bay, Wisconsin' (Levine & Schott; Industry Wide Field Studies; survey 15 December 1978, published 6 November 1979; CDC Stacks record verified live 2026-10-03) [other_primary]
- Locator
- CDC Stacks record cdc/233468, Description field (NIOSH-provided abstract)
- Finding type
- gov_survey
- Finding
- Government documentation of the builder yard's industrial-hygiene posture: NIOSH surveyed Peterson Builders (SIC-3731) on 15 December 1978 as a candidate for its epidemiological study of health hazards in the painting trades. Approximately 731 employees worked in the boat production yard; the company had no industrial hygiene program; ventilation in painting areas was poor; personal respirators were in use. NIOSH judged Peterson 'an excellent facility to study from an industrial hygiene standpoint.'
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1978-1979
- Population
- Peterson Builders production workforce (~731 employees, December 1978)
- Limitations
- Yard-level record about the builder, not this hull - and it addresses paint-material hazards, not asbestos; the report does not document asbestos conditions. The 1978 survey post-dates this hull's construction by 22 years, so it describes the yard's later posture, not necessarily 1956-58 conditions. Does not establish materials aboard, exposure, or quantities.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-06
-
[8]National Archives, 'Researching Asbestos aboard US Naval Vessel up through 1961' (guided research topic; verified live 2026-10-03) [other_primary]
- Locator
- Guided topic page; RG 19 Entries P 11, A1/UD series; RG 38 Entries P 1-H, UD-WW 50/114/130
- Finding type
- historical_record
- Finding
- NARA's official asbestos-research guide identifies the record series covering this hull's documentation path: RG 19 Bureau of Ships correspondence (1940-1961) filed by hull designation - 'MSO519' (and 'AM519' pre-construction designation) and 'MSO519 Class' for class correspondence, with Ability herself the class namesake; private-yard correspondence under 'QM/Peterson Builders'; RG 19 Entry P 11 'Minesweeper and Minelayer General Information Books' (1940-1962, NAID 1275857) covering this hull's construction window; and RG 38 Entry P 1-H 'Minecraft Material Inspection Reports' (Board of Inspection and Survey, 1940-1978, NAID 2092723) covering her 1958 pre-commissioning inspection and any survey reports through disposal. These physical archives are unsearched.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1978 (coverage windows of the named series)
- Limitations
- Research-methodology documentation only - identifies where ship-specific asbestos records for this hull would exist; no archival records were pulled, so it establishes nothing about the hull's actual materials. The guide's own caveat applies: wider searches yield less specific results, and GIB coverage is incomplete (not every ship has one).
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-07
-
[9]Batch-7614 search ledger (this record): NHHC DANFS live page; NavSource 11/02519; HCGL vessel record; NavalCoverMuseum; shipbuildinghistory.com Peterson yard table; NARA asbestos research guide; NIOSH CDC Stacks; GAO product page; NVR; CourtListener (blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-ability-mso519-01 through -12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS Ability (MSO-519 / AM-519) was found in the public sources searched. CAVEAT: CourtListener could not be queried this session - the authenticated API reported the daily quota exhausted (~4.2 h to reset); logged as blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced only law-firm/marketing listicles (mesothelioma.com, mesotheliomavets.com, mesotheliomaguide.com, mesotheliomahope.com, freeasbestostesting.com) listing the hull as asbestos-bearing without primary sourcing - excluded by source policy.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1956-58 Navy construction falls squarely inside the documented asbestos-use era, and the litigation-repository search is a genuine open gap (blocked, not run). NARA record series identified in ev-07 are unsearched physical archives. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-08
-
[10]Designation cross-check: authoritative hull sources (DANFS header 'MSO-519', NavSource 'MSO 519', HCGL 'MSO-519', NavalCoverMuseum 'MSO-519') vs secondary lists carrying 'AM-519' (Wikipedia 'List of mine warfare vessels of the United States Navy'; GlobalSecurity.org mine-warfare index; law-firm listicles; TogetherWeServed) [other_primary]
- Locator
- DANFS/NavSource/HCGL/NavalCoverMuseum designation lines; Wikipedia list of U.S. Navy mine warfare vessels; globalsecurity.org/military/systems/ship/mine.htm
- Finding type
- historical_record
- Finding
- HULL CONSOLIDATION: AM-519 and MSO-519 are the same hull, not two vessels. The Ability class (AM-519/520/521) was authorized under AM (minesweeper) designations; per secondary references the class became Minesweepers, Ocean (MSO) on 7 February 1955 - more than a year before this hull was laid down (5 March 1956) - so she was built, commissioned, and served only as MSO-519. 'AM-519' survives as the pre-construction contract designation in secondary lists; no authoritative hull source (DANFS, NavSource, HCGL, NVR) displays an AM designation for her.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1955-1956 (designation window)
- Limitations
- The AM-519 attribution rests on secondary sources; authoritative hull sources carry only MSO-519. The 7 February 1955 class redesignation date is likewise secondary (Wikipedia mine-warfare list; consistent with the documented fleet-wide AM->MSO redesignation of that date). No asbestos content; resolves a one-hull/two-designation ambiguity in the tier listing.
- Atlas source
- true
- Evidence ID
- ev-uss-ability-mso519-09