Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 1078-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-81-yms81-pkt-1078-packet-md
-
[2]NavSource Online, Mine Warfare Vessel Photo Archive, YMS-81 (verified live 2026-10-05) [other_primary]
- Locator
- YMS-81 page header, chronology block, and closing note
- Finding type
- vessel_history
- Finding
- NavSource's live YMS-81 hull page identifies this vessel as a YMS-1-class auxiliary motor minesweeper: laid down 16 July 1941 by Stadium Yacht Basin, Cleveland, Ohio; launched 30 May 1942; completed and commissioned 28 July 1942; damaged by a suicide plane in the Okinawa area on 7 April 1945; damaged by grounding in the Okinawa area on 29 May 1945; decommissioned 3 May 1946 at San Diego; struck from the Naval Register 10 June 1947; transferred to the War Shipping Administration and sold 9 March 1948; fate unknown. The page states that no DANFS history is available for YMS-81.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1948
- Population
- Stadium Yacht Basin construction trades; YMS-81 crew; post-Navy custodians
- Limitations
- NavSource is a specialist naval-history archive rather than the underlying Navy register or a DANFS entry; the page does not provide a full operational narrative or any asbestos/material-content statement. The fate after the 1948 sale is unknown.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-01
-
[3]National Archives, Special List #44, by Ship Numbers, PDF entry for YMS-81 [other_primary]
- Locator
- PDF page 122 of 137 (printed page 123): YMS-81 1/1/1943 6/30/1945 see YMS-80, 1942; YMS-81 7/28/1942 6/30/1945
- Finding type
- historical_record
- Finding
- The National Archives Special List 44, by Ship Numbers, lists two YMS-81 deck-log lines: 1 January 1943 through 30 June 1945, with a note to see YMS-80 for 1942, and 28 July 1942 through 30 June 1945. These are archival log-coverage entries, not commissioning or decommissioning dates.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-07-28 to 1945-06-30
- Population
- YMS-81 crew and Navy operational activity during the indexed log period
- Limitations
- This is a finding aid, not deck-log text. The logs were not retrieved or read, and the index contains no asbestos, insulation, exposure, or individual-service finding. The coverage dates must not be substituted for service-status dates.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-02
-
[4]NavSource Online, Mine Warfare Vessel Photo Archive, YMS-81 specifications block [other_primary]
- Locator
- YMS-81 specifications block
- Finding type
- historical_record
- Finding
- NavSource lists YMS-81's specifications as 270 tons displacement, 136 feet length, 24 feet 6 inches beam, 8 feet draft, 15-knot speed, complement 32, one 3-inch/50 dual-purpose gun mount, two 20-mm mounts, two depth-charge projectors, and two 880-bhp General Motors 8-268A diesel engines through Snow and Knobstedt single-reduction gear to two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-1946
- Population
- YMS-81 crew and machinery personnel
- Limitations
- The complement is a specification figure, not a dated muster count. The diesel machinery and absence of a steam plant in this source constrain system context but do not establish asbestos content in any component.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-03
-
[5]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979) [gao]
- Locator
- GAO product-page Highlights
- Finding type
- gov_survey
- Finding
- GAO's 1979 review addressed asbestos use in Navy ships, the cost of removing asbestos from Navy ships, and Navy protection of shipyard workers. Its official summary states that the Navy's 1975 policy was to remove and replace non-asbestos materials only when damaged insulation had to be removed for necessary repairs, with a 1979 modification for selected high-maintenance areas.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1942-1979
- Population
- Navy shipyard workers and Navy vessels covered by the 1979 review
- Limitations
- Program-level Navy evidence, not a YMS-81 record. It supports era context only and does not prove installation, location, condition, disturbance, quantity, exposure, or causation aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-04
-
[6]National Archives, Researching Asbestos aboard US Naval Vessel up through 1961 [other_primary]
- Locator
- Sections 'General Information Books', 'Ship Engineering Drawings', and 'Other Records and their usefulness'
- Finding type
- regulatory
- Finding
- NARA's official asbestos research guide identifies Minesweeper and Minelayer General Information Books (RG 19, Entry P 11), ship specifications, engineering drawings including insulation and lagging drawings, and material-inspection records as archival pathways for researching asbestos questions in Navy vessels through 1961. These are open research leads for YMS-81; no hull-level file was retrieved in this session.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-05
- Study period
- 1941-1961
- Population
- U.S. Navy vessel material records, 1941-1961
- Limitations
- This row documents research pathways, not the existence of asbestos aboard YMS-81. The guide expressly describes deck logs as useful for work dates but not direct asbestos evidence; the relevant logs and hull-level technical records were not retrieved.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-05
-
[7]NavSource YMS-1 class index and YMS-81 specifications; GAO HRD-80-2; NARA asbestos research guide [other_primary]
- Locator
- YMS class description and YMS-81 specifications; GAO Highlights; NARA research-guide record-series sections
- Finding type
- asbestos_application
- Finding
- Era/class inference only: YMS-81 was a wooden YMS-1-class diesel minesweeper built and operated during the Navy's documented WWII-era asbestos-use period. Possible maintenance-related applications include diesel exhaust lagging, gaskets, valve packing, electrical insulation, and brake linings; no one of these applications is confirmed aboard YMS-81.
- Verification
- inferred
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1948
- Population
- WWII-era YMS construction trades, crew, and maintenance personnel
- Limitations
- Class/era inference only. It does not establish that asbestos was installed aboard YMS-81, identify a manufacturer or product, quantify material, establish remaining ACM, or prove exposure or causation. The vessel's diesel plant means boiler/turbine lagging is not asserted.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-06
-
[8]Batch-9164 source review: NavSource YMS-81 and YMS index; NARA Special List 44 and asbestos guide; GAO HRD-80-2 [other_primary]
- Locator
- Search-ledger rows sl-uss-yms-81-yms81-01 through -11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record was located in the public sources searched for YMS-81: the live hull page, NARA deck-log finding aid, NARA asbestos research guide, and GAO Navy-wide review do not provide a YMS-81 asbestos survey, abatement contract, hazmat disclosure, material schedule, product identification, or adjudicated exposure finding. Ship-specific asbestos status is therefore unknown.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Failure to locate a public record does not prove absence of asbestos aboard the hull. Undigitized or uncataloged RG 19/RG 38 records remain open leads. This negative finding does not establish or defeat any exposure claim or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-07
-
[9]CourtListener authenticated search helper status (cl-auth-search.py); fleet-wide pacing budget unavailable during this session [court_record]
- Locator
- Four required helper invocations; each reported fleet-wide pacing budget momentarily spent before returning search JSON
- Finding type
- litigation_documented
- Finding
- The required authenticated CourtListener sweep was attempted through cl-auth-search.py for exactly four base queries: exact-name opinion ('USS YMS-81'), exact-name docket ('USS YMS-81'), hull-number opinion ('YMS-81'), and hull-number docket ('YMS-81'), each with limit 20. The fleet-wide pacing limiter denied each request before a result returned. No asbestos-qualified variants were run, and no litigation negative finding is made.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Population
- Potential YMS-81/YMS-81 litigation records
- Limitations
- This is a research-gap record, not a no-litigation result. The helper was used and no anonymous or raw CourtListener request was made. The four-query sweep did not return results because of the limiter; variants were correctly not run because no base query produced an overflow page.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-81-yms81-08