Evidence
13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).
-
[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-86-yms86-pkt-1078-packet-md
-
[2]National Archives, Special List 44, List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units (by ship number), YMS-86 entry [other_primary]
- Locator
- Special List 44 ship-number PDF, p. 123, entry 'YMS-86 6/12/1942 6/30/1945' and 'YMS-87 8/15/1942 12/31/1942 see YMS-86, 1942'
- Finding type
- vessel_history
- Finding
- NARA inventories a deck-log run for YMS-86 from 12 June 1942 through 30 June 1945. The same inventory cross-files YMS-87's 15 August-31 December 1942 entries under YMS-86 ('see YMS-86, 1942'). This identifies the numbered vessel and supplies an archival lead for its wartime operations and personnel records (RG 24, Entry 118, Archives II).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-06-12 to 1945-06-30 (inventoried log coverage)
- Population
- U.S. Navy personnel recorded in the deck-log run
- Limitations
- This is an inventory of deck logs, not a commissioning, decommissioning, construction, material, or asbestos record. The coverage dates are not asserted as service dates - the vessel is documented elsewhere as commissioned 12 May 1942 and decommissioned April 1946, both outside/inside this window differently. The logs are not digitized (YMS-86 is absent from NARA's online deck-log list). Does not establish asbestos presence, products, quantity, individual exposure, causation, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-01
-
[3]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-86 page (11/19086) [other_primary]
- Locator
- Page body, specifications block, commanding-officers table; photo 12 May 1942 (Robert Hurst)
- Finding type
- vessel_history
- Finding
- NavSource documents YMS-86 as a YMS-1-class auxiliary motor minesweeper: laid down 26 June 1941 by Al Larson Boat Shop, Terminal Island, CA; launched 31 January 1942; commissioned 12 May 1942; station ship at Efate Island, New Hebrides; visited Auckland, New Zealand four times between 6 October and 22 November 1944; arrived Okinawa 1 April 1945 and departed in June 1945; decommissioned April 1946; struck from the Naval Register 17 April 1946; transferred to the War Shipping Administration March 1947 and sold to the Soviet Union for use as a fishing vessel; fate unknown. Specifications: 270 t, 136 ft, beam 24 ft 6 in, draft 6 ft 1 in, 13 knots, complement 33, one 3"/50 DP mount, two 20mm mounts, two depth charge tracks and two projectors, two GM 8-268A diesels with Snow and Knobstedt single-reduction gear. Call sign Nan-Uncle-Mike-How; CO listed LTJG J. W. Welty, USNR (1945). Page states 'There is no DANFS history available for YMS-86.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947 (timeline); page maintained through 2023
- Limitations
- NavSource is a volunteer-run official-photo archive, not a government record; its timeline is consistent with NARA's log inventory and the builder's yard table but the Soviet-Union disposition is uncorroborated by a second authoritative source. The 'departed [Okinawa] in June 1945' line is ambiguous against her documented presence at Okinawa during Typhoon Louise in October 1945. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-02
-
[4]Shipbuilding History (Tim Colton), Al Larson Boat Shop, Terminal Island CA, yard construction table [other_primary]
- Locator
- Al Larson Boat Shop yard page, hull table row 'YMS 86'
- Finding type
- vessel_history
- Finding
- The builder's yard table lists YMS 86 for the U.S. Navy, minesweeper, 136 ft, completed/delivered 12 May 1942, disposition 'Struck 1946' - corroborating the builder identity, yard location, hull size, and commission-date figure given by NavSource. The yard was established 1903 by Peter Adolph (Al) Larson and built and repaired fishing vessels and small craft on Terminal Island.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1946
- Limitations
- Specialist secondary compilation built from maritime records, not the builder's own archive; 'Struck 1946' is terse and carries no postwar disposition detail. Confirms construction facts only - no asbestos, material, or machinery documentation. Al Larson Boat Shop is not present in the project's shipyards.json yard dataset.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-03
-
[5]uboat.net Allied Warships of WWII, USS YMS-86 (YMS-86) entry [other_primary]
- Locator
- Ship page 9506 data table
- Finding type
- vessel_history
- Finding
- uboat.net's Allied Warships entry lists YMS-86: ordered 1 April 1941; built by Al Larson Boat Shop Inc. (Terminal Island, California); laid down 26 June 1941; launched 31 January 1942; commissioned 12 May 1942; stricken 17 April 1946 - corroborating the NavSource timeline and adding the order date.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1946
- Limitations
- uboat.net is a long-running specialist reference, not an official archive; used here only to corroborate NavSource and to supply the contract-order date NavSource omits. No asbestos, material, or machinery detail. Does not establish any exposure condition.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-04
-
[6]Transcription of Commander in Chief, U.S. Pacific Fleet and Pacific Ocean Areas Report, Serial 0395 of 11 February 1946 (World War II Command File, Operational Archives Branch, Naval Historical Center) - Typhoon Louise damage table [other_primary]
- Locator
- Damage table, YMS section, row 'YMS 86 - Damaged seriously but afloat'; provenance note at page foot
- Finding type
- vessel_history
- Finding
- The transcribed CINCPAC report on Typhoon Louise (9 October 1945, Okinawa/Buckner Bay) lists 'YMS 86 - Damaged seriously but afloat' in the post-storm vessel damage table, placing the hull at Okinawa during the typhoon that sank seven U.S. YMS boats.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-10-09 (report issued 1946-02-11)
- Population
- Crew aboard during the storm; salvage personnel
- Limitations
- Private-site transcription of an official report; the underlying serial was not inspected directly, so transcription fidelity is unverified. 'Damaged seriously but afloat' is the report's phrase; the record does not document repairs, casualties, or material damage in detail. No asbestos information. Creates a tension with NavSource's 'departed [Okinawa] June 1945' - she evidently was at Okinawa again by October 1945.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-05
-
[7]Navy WWII campaign participation list (transcription), YMS-86 entry [other_primary]
- Locator
- YMS-1 to YMS-200 list, 'YMS 86: 2 Apr 45 - 21 Jun 45 P34-1'
- Finding type
- vessel_history
- Finding
- The official-list transcription credits YMS-86 with Asiatic-Pacific campaign participation P34-1, 'Assault and occupation of Okinawa Gunto,' 2 April-21 June 1945 - the vessel's only listed WWII campaign credit.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-04-02 to 1945-06-21
- Limitations
- Commercial ribbon vendor hosting a transcription of the official Navy campaign-participation list (NAVPERS 15,790 lineage); underlying official publication not inspected. Establishes campaign presence at Okinawa consistent with NavSource's 1 April arrival; no asbestos or material information.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-06
-
[8]NavSource Online: Mine Warfare Vessel Photo Archive, Auxiliary Motor Minesweepers (YMS) index page [other_primary]
- Locator
- YMS index page, class description text and specifications table
- Finding type
- vessel_history
- Finding
- NavSource's class index documents the YMS type: designed by Henry B. Nevins, Inc. of City Island, NY (YMS-1 keel laid 4 March 1941); wooden-hulled; 561 built at 35 yacht yards rather than naval shipyards (12 East Coast, 19 West Coast, four Great Lakes); class specifications 136 ft, 24 ft 6 in beam, 320 tons, complement 33, GM 8-268A diesels on two shafts, designed 880 shp; and seven U.S. YMS boats sunk in the 9 October 1945 typhoon off Okinawa.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1945 (class construction and service era)
- Population
- YMS-class crews (class context)
- Limitations
- Class-level context from the same archive as the ship page; the 320-ton class displacement conflicts with the 270 t shown on the YMS-86 page itself (carried in gaps). No asbestos or material information. Establishes the class-wide wooden construction that bounds this hull's asbestos-relevant systems.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-07
-
[9]Hobart Hughes, 'Saga of a YMS,' U.S. Naval Institute Proceedings 74(1)/539 (January 1948) [reputable_press]
- Locator
- Proceedings Vol. 74, No. 1, whole-article text, machinery paragraph
- Finding type
- vessel_history
- Finding
- A professional-journal memoir of sister vessel YMS-238 describes the YMS class plant: wooden hull (~135 ft x 24 ft), two General Motors diesels for main propulsion electro-pneumatically controlled from the bridge, a third GM diesel direct-connected to a generator for magnetic minesweeping, and two Hercules 30-kW diesels for auxiliary power; crew of thirty enlisted men and four officers. This documents the class as all-diesel with no steam plant aboard.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1942-1945 (narrative); published 1948
- Population
- YMS crews (class context)
- Limitations
- First-person account of YMS-238, not YMS-86; carried as class-level plant description only. Contains no asbestos information - its relevance is bounding which asbestos-relevant systems (no boilers, no steam piping) existed aboard this vessel type. Article text retrieved via Firecrawl because usni.org returns HTTP 403 to direct requests.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-08
-
[10]EPA HERO index record 3584926 for Rushworth, D.H., 'The Navy and asbestos thermal insulation,' Naval Engineers Journal 117(2):35-48 (2005), DOI 10.1111/j.1559-3584.2005.tb00336.x [other_primary]
- Locator
- EPA HERO reference page, abstract field
- Finding type
- asbestos_application
- Finding
- EPA HERO's indexed abstract states asbestos was used in U.S. Navy shipboard pipe and machinery thermal insulation and in many other shipboard products, and that plaintiffs in asbestos litigation include many exposed while serving aboard Navy ships built during and following WWII, with thermal insulation the most likely exposure source.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- WWII and post-WWII era
- Population
- Navy ship crews and shipyard workers of the WWII-and-later era (general)
- Limitations
- Navy-wide era documentation from a peer-reviewed technical journal indexed by a federal database; does not name YMS-86 or the YMS class, and does not establish that asbestos was installed aboard this hull, in what products, or in what quantity. Supports era-consistent inference only.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-09
-
[11]U.S. GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct. 18, 1979) [gao]
- Locator
- GAO product page, Highlights section
- Finding type
- gov_survey
- Finding
- GAO reviewed Navy use of asbestos in ships and the Navy's asbestos-removal policy at Long Beach and Norfolk Naval Shipyards; its summary states the 1975 policy was to remove and replace only damaged insulation or insulation that had to be removed for repairs, modified in 1979 to selectively replace asbestos insulation in high-maintenance areas.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1975-1979 policy context; report published 1979
- Population
- Navy shipyard workers and Navy ships reviewed by GAO
- Limitations
- Navy-wide program and shipyard context published decades after this hull left U.S. service; does not name YMS-86 or establish that this hull contained asbestos, identify products, quantify material, or establish exposure or legal eligibility. Page content retrieved via Firecrawl because gao.gov returns HTTP 403 to direct curl requests.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-10
-
[12]Batch-9169 search ledger (this record): NARA Special List 44 and online deck-log list; NHHC/DANFS; NavSource; shipbuildinghistory; uboat.net; CINCPAC Serial 0395 transcription; official campaign-list transcription; USNI Proceedings; EPA HERO; GAO; CourtListener authenticated sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-86-yms86-01 through sl-uss-yms-86-yms86-16
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or ship-specific material list naming YMS-86 was found in the official and authoritative sources searched (see search_ledger). No DANFS history exists for this hull (NavSource states so; NHHC returns no page).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1942 wartime wooden minesweeper predates survey regimes. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-11
-
[13]CourtListener API v4 authenticated searches via /Users/charlesfletcher/devin-prompts/cl-auth-search.py: 'USS YMS-86' opinion 0 results; 'YMS-86' opinion 0 results; 'YMS-86' docket 0 results; 'USS YMS-86' docket attempted but held by the shared fleet pacing limiter [court_record]
- Locator
- Helper output: authenticated HTTP 200 count 0 for 'USS YMS-86' type=o, 'YMS-86' type=o, 'YMS-86' type=r; pacing diagnostics for 'USS YMS-86' type=r
- Finding type
- litigation_documented
- Finding
- Three of four required base queries completed with verified zero counts: 'USS YMS-86' opinions, 'YMS-86' opinions, and 'YMS-86' dockets each returned 0 results - no opinion or docket indexed on CourtListener names this hull under either string. The remaining required base query ('USS YMS-86' docket, type=r) was initiated repeatedly but did not return before the shared fleet pacing window expired.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Three verified zero results; the fourth base query is pending, not negative - a zero base result means a zero asbestos-variant result, so no qualified variants were run. Re-run the pending 'USS YMS-86' docket query through the helper when fleet pacing permits; do not infer completeness of the sweep from this gap. A hull-number string match is also not automatically a case.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-86-yms86-12