USS YMS-101

Evidence

13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).

1. [1]research packet 1027-packet.md [other_primary]

   Finding type

   vessel_history

   Finding

   Identity packet verdict: VERIFIED (thin sourcing, disclosed)

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Limitations

   qualifier: VERIFIED (thin sourcing, disclosed)

   Evidence ID

   uss-yms-101-yms101-pkt-1027-packet-md

2. [2]NavSource Online, Mine Warfare Vessel Photo Archive, YMS-101 (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   Header chronology, specifications block, photograph table ('c. 1945 Hawaii', source David Wright), and 'no DANFS history' note

   Finding type

   vessel_history

   Finding

   NavSource's live timeline identifies the hull as laid down 22 July 1941 by the Astoria Marine Construction Co., Astoria, OR; launched 20 June 1942; completed 17 July 1942; struck from the Naval Register 19 June 1946; transferred to the State Department, Foreign Liquidation Commission in October 1947; fate unknown. The page lists call sign Nan-Able-Fox-Easy and specifications: displacement 270 t., length 136 ft, beam 24 ft 6 in, draft 8 ft, speed 15 kts, complement 32, armament one 3"/50 dual-purpose mount, two 20mm mounts, and two depth-charge projectors, and propulsion of two 880-bhp General Motors 8-268A diesel engines with Snow and Knobstedt single reduction gear on two shafts. The page's single photograph is captioned 'c. 1945 Hawaii' and shows YMS-101 moored between an unidentified Patrol Craft Sweeper and SC-505, with PC-602 across the pier. The page states there is no DANFS history available for YMS-101.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1941-1947

   Population

   Astoria Marine Construction trades (1941-42); U.S. Navy YMS-101 crew (1942-46); Foreign Liquidation Commission custody (1947)

   Limitations

   NavSource is a live secondary photo-archive compilation, not an official registry. It supports the stated timeline, specifications, and the captioned Hawaii photograph only; it records 'Completed 17 July 1942' rather than an explicit commissioning event, the photograph's c. 1945 date and Hawaii location rest on contributor captioning, and the page contains no asbestos, survey, abatement, product, or exposure evidence.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-01

3. [3]uboat.net Allied Warships, USS YMS-101 (YMS-101) entry (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   Data table (Navy/Type/Class/Pennant/Built by/Ordered/Laid down/Launched/Commissioned/History rows)

   Finding type

   vessel_history

   Finding

   uboat.net's Allied Warships entry for USS YMS-101 records: built by Astoria Marine Construction Co. (Astoria, Oregon); ordered 1 April 1941; laid down 22 July 1941; launched 20 June 1942; commissioned 17 July 1942; stricken 19 June 1946. No commanding officers are listed for the vessel.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1941-1946

   Limitations

   uboat.net is a private secondary compilation, not an official register. It is the only located source printing an explicit 'Commissioned' date (17 July 1942) and an order date (1 April 1941) for this hull; both are corroborated indirectly - the NARA deck-log index opens 17 July 1942 and the secondary literature dates the Astoria four-boat YMS contract award to 1 April 1941 - but no official instrument verifies either. No asbestos, survey, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-02

4. [4]National Archives, Special List #44, by Ship Numbers (live PDF retrieved and text-extracted 2026-10-04, HTTP 200) [other_primary]

   Locator

   YMS section, row 'YMS-101 7/17/1942 6/30/1945' (adjacent rows: YMS-100 6/20/1942-8/16/1945; YMS-102 8/22/1942-6/30/1945)

   Finding type

   historical_record

   Finding

   NARA's Special List #44, by Ship Numbers, indexes a single deck-log coverage interval for YMS-101: 17 July 1942 to 30 June 1945. This establishes indexed wartime Navy deck logs for the hull. The interval ends roughly eleven and a half months before she was struck (19 June 1946), so the period July 1945 - June 1946 carries no indexed coverage under this finding aid.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1942-1945 records

   Limitations

   A finding-aid index entry, not the logs themselves: it establishes that NARA catalogs deck-log coverage for the stated interval but not the logs' contents, completeness, or digitization status. The absence of coverage after 30 June 1945 is an index result, not proof that later logs do not exist elsewhere. Establishes no asbestos, event, or exposure fact.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-03

5. [5]National Archives, An Introduction to Navy Deck Logs; Logbooks of the U.S. Navy at the National Archives (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   NARA deck-log guidance: RG 24 permanent-log rules and College Park holdings; catalog search attempted at catalog.archives.gov (JS shell returned to curl and webfetch, no result content)

   Finding type

   historical_record

   Finding

   NARA's deck-log guidance explains the record path for this hull's indexed logs: only deck logs of commissioned Navy ships are retained permanently in Record Group 24, and logs of 1941 and later are generally held at College Park, Maryland. The public catalog search is JavaScript-rendered and could not be fetched during this pass, so whether YMS-101's indexed 1942-45 logs are digitized or require a box-level reproduction request is unverified.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   context_only

   Accessed

   2026-10-04

   Study period

   1942-1945 records

   Limitations

   Record-path guidance only. Establishes where YMS-101's indexed logs would reside if held, not that they are digitized, complete, or accessible online; a box-level NARA request or a rendered-catalog session is the open lead. No asbestos finding is asserted.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-04

6. [6]U.S. Navy, United States Pacific Fleet Organization, 1 May 1945 (Navy Department Library document transcribed at HyperWar/ibiblio; live page verified 2026-10-04) [other_primary]

   Locator

   MINECRAFT, PACIFIC FLEET > MINE SQUADRON TWENTY vessel roster (YMS-1 through YMS-481 range; YMS-100 and YMS-103 present, YMS-101 absent); the canonical NHHC copy of this document returned HTTP 404 live

   Finding type

   historical_record

   Finding

   The official U.S. Pacific Fleet organization dated 1 May 1945, transcribed at HyperWar, does not list YMS-101 anywhere in its minecraft organization: the Mine Squadron TWENTY roster - the Pacific Fleet's YMS squadron - runs YMS-1 through YMS-481 with gaps but contains no YMS-101 entry, while listing her Astoria-built sisters YMS-100 and YMS-103. The roster is a fleet-command organization; sea-frontier and naval-district-assigned craft are not enumerated as vessel rosters in it.

   Verification

   verified

   Role

   negative_finding

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1945-05-01

   Limitations

   An absence finding, not a location finding: it establishes only that YMS-101 was not an enumerated Pacific Fleet minecraft unit on 1 May 1945. The document does not roster sea-frontier-assigned craft, so a Hawaiian Sea Frontier or naval-district assignment remains possible but is inference, not documentation. The 'c. 1945 Hawaii' NavSource photograph is consistent with, but does not prove, such an assignment.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-05

7. [7]HyperWar (ibiblio), Ships of the U.S. Navy, 1940-1945, USS YMS-101 page (live page verified 2026-10-04) [other_primary]

   Locator

   Specification block (displacement through h.p. lines); blank 'Built at ___ and commissioned ___' fields

   Finding type

   vessel_history

   Finding

   The HyperWar transcription of Ships of the U.S. Navy, 1940-1945 carries a per-hull YMS-101 page with the class specification block: displacement 320 tons (full), length 136 ft, beam 24 ft 6 in, draft 6 ft 1 in, speed 13 knots, armament one 3"/50, two 20mm, two depth-charge tracks plus two extensions and two depth-charge projectors, complement 4 officers and 29 crew, diesel engines on twin screws rated 500 h.p. The page's built-by and commissioned fields are blank and it carries no photograph.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1940-1945 publication data

   Limitations

   A wartime-era official-data transcription of a per-hull page, but the specification block is the class generic and conflicts with the NavSource secondary compilation on displacement (320 vs 270 t.), draft (6 ft 1 in vs 8 ft), speed (13 vs 15 kts), complement (33 vs 32), and engine rating (500 h.p. vs 1,760 bhp combined) - all conflicts carried in gaps. Contains no asbestos, material-list, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-06

8. [8]shipbuildinghistory.com Yard Minesweepers table and Astoria yard table; Naval Marine Archive mirror of the YMS table; uswarships.jounin.jp YMS table (all live-verified 2026-10-04) [other_primary]

   Locator

   ym.htm YMS-101 row; shipyards/small/astoria.htm YMS 101 row; navalmarinearchive.com/sbh/smallships/ym.html YMS-101 row; uswarships.jounin.jp/yms.htm YMS-101 entry

   Finding type

   vessel_history

   Finding

   The Colton shipbuilding-history yard-minesweeper tables, checked live at both the canonical domain and the Naval Marine Archive mirror, list YMS-101 as an Astoria Marine (Astoria OR) build of 136 ft and 320 tons delivered 17 July 1942, disposition 'Struck 1946'; the companion Astoria yard page repeats the entry (278d tons, 137 ft, delivery 17-Jul-42, 'Struck 1946'). The uswarships.jounin.jp compilation corroborates: builder Astoria Marine Construction Co., laid down 1941/7/22, launched 1942/6/20, completed 1942/7/17, struck 1946/6/19.

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1941-1947

   Limitations

   Private secondary compilations (Colton's shipbuilding-history dataset and mirrors; the jounin.jp table) - not official registers, but convergent with NavSource and uboat.net on the milestone chain. Displacement figures differ between tables (320 t. vs 278d) and are carried in gaps. No asbestos or exposure content. The shipbuildinghistory.njscuba.net mirror returned HTTP 500 to direct fetch during this pass; the canonical domain and the Naval Marine Archive mirror are live.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-07

9. [9]Marsh's Maritime Media (libertyshipfactory.com), 'Astoria Yard's WW II YMS Minesweepers' (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   Contract paragraph ($1,312,000 award 1 April 1941); construction paragraphs (second keel, Douglas fir planking, GM 400 HP diesels); delivery-sequence paragraph

   Finding type

   vessel_history

   Finding

   A private local-history article on the builder's wartime YMS program, citing company records, reports that the Navy awarded Astoria Marine Construction a $1,312,000 contract on 1 April 1941 for four yard minesweepers; that the yard built a new assembly-line shipyard at the Port of Astoria to produce them; and that oak frames were set on the second keel for YMS-101 with inner planking of two-inch Douglas fir beneath an outer layer over one inch thick, to withstand the shock of deliberately detonated swept mines. The article states the four boats were delivered in sequence: YMS-100 launched 12 April 1942, 'the second minesweeper' delivered 17 July 1942, YMS-102 a month later, and YMS-103 on 18 September 1942 - the 17 July 1942 delivery matching the convergent sources' YMS-101 completion date. It also describes the engines as a pair of GM 400 HP diesels.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1941-1942

   Population

   Astoria Marine Construction trades (1941-42)

   Limitations

   A local-history article asserting company records - private secondary sourcing, not an official document; the underlying yard records are not publicly accessible. Its contract amount and four-boat award date agree with the uboat.net 'Ordered 1 Apr 1941' line and the milestone chain, and its construction detail is yard-level description of this hull's build. The 400 HP engine rating conflicts with NavSource's 880 bhp figure and is carried in gaps. No asbestos, material-list, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-101-08

10. [10]NavSource Online, Auxiliary Motor Minesweeper (YMS) Photo Index, class description (live page verified 2026-10-04, HTTP 200) [other_primary]

    Locator

    Class description paragraphs (481 hulls, 35 yacht yards, wood-hulled, stack-appearance groupings, 1947 AMS reclassification note)

    Finding type

    vessel_history

    Finding

    NavSource's YMS index describes the class context: the wood-hulled YMS type comprised 481 ships built at 35 yacht yards - 12 on the East Coast, 19 on the West Coast, and four in the Great Lakes - all with the same general characteristics; YMS-1 through YMS-134 carried two stacks, the appearance group containing YMS-101. The type was originally rated service craft and used in World War II for inshore sweeping to prepare amphibious assaults; surviving YMS hulls were reclassified AMS in 1947 and given names. YMS-101, struck 19 June 1946, predated that reclassification and never received a name.

    Verification

    verified

    Role

    context

    Documentation level

    class_or_era

    Accessed

    2026-10-04

    Study period

    1941-1947 class framing

    Limitations

    Class-level background from a secondary compilation; it contextualizes the design (wooden hull, yacht-yard construction, diesel plant) but establishes nothing ship-specific about YMS-101 beyond her membership in the two-stack appearance group (YMS-1 through 134). Contains no asbestos, material-list, or exposure content.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-101-09

11. [11]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (1979) [gao]

    Locator

    GAO product record HRD-80-2; direct product and PDF requests returned HTTP 403 during this pass

    Finding type

    gov_survey

    Finding

    GAO's 1979 report Navy Efforts To Protect Workers From Asbestos Exposure is Navy-wide historical context for asbestos use and worker-protection efforts; it is retained only as class/era context for a Navy vessel constructed in 1941-42.

    Verification

    partial

    Role

    context

    Documentation level

    class_or_era

    Accessed

    2026-10-04

    Study period

    1979 report; vessel construction 1941-42

    Population

    Navy asbestos program and workers (program-level context)

    Limitations

    The report was not retrievable live because GAO returned HTTP 403 (confirmed 2026-10-04), so no detailed report proposition is attributed here. Navy-wide context cannot establish asbestos installation, product identity, quantity, condition, exposure, or causation aboard this hull.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-101-10

12. [12]Research result for this batch; see search ledger and access gaps [other_primary]

    Locator

    Searches documented in search_ledger

    Finding type

    asbestos_application

    Finding

    No ship-specific asbestos survey, abatement record, hazmat disclosure, or product-identification record was located in the sources reviewed for this batch. Ship-specific asbestos documentation is unknown.

    Verification

    partial

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-10-04

    Study period

    2026-10-04

    Limitations

    A bounded search result, not proof that records do not exist. NARA notes that many Navy records are not digitized, and the NavSource, uboat.net, shipbuilding-history, jounin.jp, HyperWar, Naval Marine Archive, and local-history sources reviewed contain no asbestos information. No class-era inference is used to claim asbestos aboard this hull.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-101-11

13. [13]CourtListener authenticated API v4 helper sweep, 2026-10-04; secondary web sweep same date [other_primary]

    Locator

    search_ledger rows sl-uss-yms-101-17 through sl-uss-yms-101-20; completed query response {count: 0, results: []}

    Finding type

    historical_record

    Finding

    No qualifying ship-specific asbestos litigation result was located in this pass. All four mandatory authenticated CourtListener base searches completed with count 0: the exact-name opinion query ("USS YMS-101", type=o, limit 20), the exact-name docket query ("USS YMS-101", type=r, limit 20, document_count 0), the hull-number opinion query ("YMS-101", type=o, limit 20), and the hull-number docket query ("YMS-101", type=r, limit 20, document_count 0). A separate secondary-web sweep for asbestos litigation naming this hull surfaced no qualifying case.

    Verification

    partial

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-10-04

    Study period

    2026-10-04

    Limitations

    The completed zero-result searches do not prove no litigation exists: they cover the opinion and docket indices only under the quoted strings and are not full-text exposure discovery. No asbestos-qualified variants were run because no completed base query returned a 20-result overflow, and a zero base result implies a zero variant.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-101-12