USS YMS-1

Evidence

12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).

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

   Finding type

   vessel_history

   Finding

   Identity packet verdict: VERIFIED (thin sourcing on later lifecycle, disclosed)

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Limitations

   qualifier: VERIFIED (thin sourcing on later lifecycle, disclosed)

   Evidence ID

   uss-yms-1-yms1-pkt-1027-packet-md

2. [2]NavSource Online, Mine Warfare Vessel Photo Archive, YMS-1 (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   Header chronology, specifications block, call-sign line, commanding-officer table, and photo credit line

   Finding type

   vessel_history

   Finding

   NavSource's live page for this hull records: laid down 4 March 1941 by Henry B. Nevins Inc., City Island, NY; launched 10 January 1942; completed 25 March 1942; struck from the Naval Register 17 April 1946; transferred to the War Shipping Administration in March 1948; fate unknown. The page's specification block lists: 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 gun mount, two 20mm mounts, and two depth charge projectors, and propulsion two 880 bhp General Motors 8-268A diesel engines with Snow and Knobstedt single reduction gear on two shafts. Call sign Nan-Able-Easy-How. The commanding-officer table lists LT H. R. Pierce, Jr., USNR (1943) and LT Robert Neville Compton, USNR (1945). The page states: 'There is no DANFS history available for YMS-1.' A single photograph ('Launching') is credited to the City Island Nautical Museum and Tom Nye.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1941-1948

   Population

   Henry B. Nevins construction trades (1941-42); U.S. Navy YMS-1 crew (1942-46); War Shipping Administration custody (1948)

   Limitations

   NavSource is a live secondary photo-archive compilation, not an official registry. It supports the stated timeline, specification block, call sign, two-officer list, and photo credit only; it styles 25 March 1942 'Completed' rather than 'Commissioned', its spec block conflicts with its own class-index figures (270 t vs 320 t; 15 kts vs 12 kts designed; 32 vs 33 complement; 8 ft vs 6 ft 1 in draft), and its two-officer list conflicts with uboat.net's four-officer list (see ev-02 and gaps). It contains no asbestos, survey, abatement, product, or exposure evidence.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-01

3. [3]uboat.net, Allied Warships, USS YMS-1 (YMS-1) (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   Ship data table (ordered/laid down/launched/commissioned/stricken) and 'Commands listed' table

   Finding type

   vessel_history

   Finding

   uboat.net's Allied Warships entry for USS YMS-1 records: ordered 11 December 1940; built by Henry B. Nevins Inc., City Island, New York; laid down 4 March 1941; launched 10 January 1942; commissioned 25 March 1942; 'Stricken 17 April 1946'. Its commanding-officer table (WWII only) lists: Harold Irving Pratt, USNR (25 March 1942 - early 1943); Burt E. Taylor, Jr., USNR (early 1943 - mid 1943); Lt.(jg) Robert Neville Compton, USNR (mid 1943 - mid 1945); L W Schenck, USNR (mid 1945 - late 1945).

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1940-1946

   Population

   U.S. Navy YMS-1 crew under the listed commanding officers (1942-45)

   Limitations

   uboat.net is a secondary compilation and flags its commands section as a work in progress ('we're still working on this section'). It uniquely supplies the 11 December 1940 order date and an explicit 'commissioned' label for 25 March 1942. Its four-officer list conflicts with NavSource's two-officer list (Pierce appears only in NavSource; Pratt, Taylor, and Schenck appear only in uboat; Compton's window differs) - carried in gaps, not resolved. No asbestos, material, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-02

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

   Locator

   PDF table, YMS section: two consecutive 'YMS-1' rows (3/27/1942-11/24/1942; 4/1/1943-4/1/1946)

   Finding type

   historical_record

   Finding

   CORRECTION (completeness): NARA's Special List #44, by Ship Numbers, indexes TWO deck-log coverage intervals for YMS-1 - 27 March 1942 through 24 November 1942 AND 1 April 1943 through 1 April 1946. The batch-supplied fact cited only the first interval; the finding aid additionally indexes a second, near-complete wartime-and-postwar run ending in the same month as the 17 April 1946 striking. A roughly four-month window (25 November 1942 - 31 March 1943) is not indexed for this hull.

   Verification

   verified

   Role

   correction

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1942-1946 records

   Limitations

   This is a finding aid showing indexed coverage spans of deck logs, not the logs themselves; it does not establish specific events, locations, commissioning, or that the unindexed four-month window represents missing records (logs for that period may be filed under another entry, lost, or never kept). It establishes no asbestos or exposure fact.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-03

5. [5]Naval Marine Archive (The Canadian Collection), Yard Minesweepers (YMS) table (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   YMS table, 'YMS 1' row; table preface paragraphs (561 boats, Mk I/II/III stack scheme, transfer counts)

   Finding type

   vessel_history

   Finding

   The Naval Marine Archive (Canadian Collection) Yard Minesweepers table lists 'YMS 1 | Henry B. Nevins | City Island NY | 136 [ft] | 320 [tons] | delivered 25-Mar-42 | Struck 1946' - independently corroborating the builder, location, delivery date, and striking year. Its table preface states that in spring 1942 - spring 1945, 35 boatyards turned out 561 wooden-hulled minesweepers; the Mk. I (YMS 1-135 and BYMS 1-30) had two stacks, the Mk. II (YMS 135-445 and BYMS 31-80) one stack, and the Mk. III (YMS 446-481) none; 150 boats went to the Royal Navy, 30 to the Free French, and 45 to the Soviet Union.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-04

   Study period

   1941-1948

   Population

   Henry B. Nevins construction trades (1941-42); U.S. Navy YMS-1 crew (1942-46)

   Limitations

   A secondary compilation openly maintained by volunteers. It corroborates builder, delivery date, and striking year; its 320-ton figure conflicts with the NavSource page's 270 t (carried in gaps); 'delivered'/'struck' labels are summary; the Mk I boundary (YMS 1-135) differs by one hull from the NavSource index's (YMS-1 through 134). No asbestos, material, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-04

6. [6]NavSource Online, Auxiliary Motor Minesweeper (YMS) Photo Index (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   Index class-description paragraphs and specification sidebar

   Finding type

   vessel_history

   Finding

   NavSource's Auxiliary Motor Minesweeper index establishes the class context and this hull's place in it: the Henry B. Nevins, Inc. Shipyard at City Island designed the type and laid YMS-1's keel on 4 March 1941 as the first United States 'Yard class Minesweeper'; 561 hulls of the wooden type were built at 35 yacht yards (12 East Coast, 19 West Coast, four Great Lakes); all 481 U.S. ships of the type shared the same general characteristics; YMS-1 through 134 had two stacks (the first/Mk I appearance group, which includes this hull); originally rated as service craft, they did WWII inshore sweeping ahead of amphibious assaults; survivors were reclassified AMS and given names in 1947, became MSC(O) in 1955 and MSCO in 1967; Ruff (MSCO-54, ex-YMS-327), last of the type in U.S. service, was struck November 1969.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-10-04

   Study period

   1941-1969

   Limitations

   Class-level context only. The operational episodes it cites (1942 sweeping off Jacksonville and Charleston, seven YMS lost in the 9 October 1945 Okinawa typhoon) are class history, not documented service of this hull. Its sidebar figures (320 t, 12 kts designed, complement 33, draft 6 ft 1 in) conflict with the YMS-1 page's block (270 t, 15 kts, 32, 8 ft) - carried in gaps. No asbestos, material, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-05

7. [7]HyperWar (ibiblio), Ships of the U.S. Navy, 1940-1945, Minecraft page, YMS section (live page verified 2026-10-04, HTTP 200) [other_primary]

   Locator

   ships-dm.html, '### YMS -- Motor Minesweepers' section (class note, specification block, fleet table YMS-1 row)

   Finding type

   vessel_history

   Finding

   The HyperWar mirror of Ships of the U.S. Navy, 1940-1945 (Minecraft section) carries a YMS class entry: the same class note as NavSource's index (wood-hulled type; 481 U.S. ships of like characteristics; YMS-1 through 134 two stacks, YMS-135 through 445, 480, and 481 one, YMS-446 through 479 none; service-craft origin; WWII inshore sweeping; Ruff MSCO-54 ex-YMS-327 last struck November 1969); a class specification block of 320 tons full, 136 ft, 24 ft 6 in beam, 6 ft 1 in draft, 13 knots, 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 of '500 h.p.'; and a fleet table listing YMS-1 with commissioning '1942-5' and no loss note.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-10-04

   Study period

   1940-1945

   Limitations

   A mirror compilation of Naval Historical Center-era material; the '1942-5' table entry is an ambiguous commissioning notation, not an individual history. The '500 h.p.' machinery figure conflicts with NavSource's 880 bhp-per-engine specification for this hull (carried in gaps). It contains no individual ship page and no asbestos, material, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-06

8. [8]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

   Deck-log guidance: RG 24 permanent-records statement, College Park holdings for 1941-and-later logs, and digitization scope caveat

   Finding type

   historical_record

   Finding

   NARA's deck-log research guidance explains the record path for this hull's logs: deck logs of commissioned Navy ships are permanent records held in Record Group 24, with 1941-and-later logs generally at College Park, Maryland, and finding aids (including Special List #44) indexing coverage by ship number. NARA also notes that only some Navy records have been digitized and many remain in paper or microfilm. This frames both the indexed YMS-1 coverage (ev-03) and the meaning of the online catalog's failure to surface digitized hull records.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   context_only

   Accessed

   2026-10-04

   Study period

   1942-1946 records

   Limitations

   Record-path guidance only. The underlying YMS-1 logbooks indexed in SL-44 were not reviewed, and no box-level or reproduction request was made; the public catalog interface was JS-rendered and unfetchable during this pass. Establishes no asbestos, event, or exposure fact.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-07

9. [9]City Island Nautical Museum, Boat Building collection page (live site verified 2026-10-04, HTTP 200) [museum_official]

   Locator

   Boat Building page, Nautical Room collection description; photo credit cross-referenced at NavSource 11/19001.htm

   Finding type

   historical_record

   Finding

   The City Island Nautical Museum (190 Fordham Street, City Island, NY) maintains collections on City Island's boatbuilding era, including 'the military vessels that were built here during the war years.' NavSource credits the museum and Tom Nye for the YMS-1 'Launching' photograph - a surviving primary-image lead for this hull held by the yard community's museum.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   context_only

   Accessed

   2026-10-04

   Study period

   1941-1942 photograph

   Limitations

   The museum page describes its collections generally; the specific YMS-1 launch photograph is not published online and its existence here is attested only through the NavSource credit line. A direct inquiry to the museum is the open lead for the image and any Nevins yard records. No document or asbestos content.

   Atlas source

   true

   Evidence ID

   ev-uss-yms-1-yms1-08

10. [10]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 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 wooden-hulled diesel minesweeper.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-1-yms1-09

11. [11]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; the NavSource, uboat.net, Naval Marine Archive, HyperWar, and museum sources reviewed contain no asbestos information. The wooden hull and diesel plant mean no boiler or steam-turbine pathway is documented, but no class-era inference is used to claim or deny asbestos aboard this hull.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-1-yms1-10

12. [12]CourtListener authenticated API v4 helper sweep, 2026-10-04; secondary web sweep same date [other_primary]

    Locator

    search_ledger rows sl-uss-yms-1-yms1-13 through sl-uss-yms-1-yms1-16; completed query response count 11 with hit-by-hit classification (cluster 8715930 verified as YMS-12 collision litigation via public opinion text)

    Finding type

    historical_record

    Finding

    No qualifying ship-specific asbestos litigation result was located in this pass. The four mandatory authenticated CourtListener base searches were attempted through the approved helper. The exact-name opinion query ("USS YMS-1", type=o, limit 20) completed with count 11; every hit was classified - one was United States v. Standard Oil Co. of New Jersey, 81 F. Supp. 183 (S.D.N.Y. 1948), an admiralty insurance case naming the minesweeper YMS-12 (a different hull - a name collision, and non-asbestos other litigation in any event), and the other ten were Texas criminal and civil appellate records matching unrelated 'YMS-1' strings (name collisions). The exact-name docket search and both hull-number searches ("YMS-1", type=o and type=r) were repeatedly declined by the authenticated helper's fleet-wide pacing gate before results returned; those are access gaps, not zero-result findings. 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 exact-name opinion search found no qualifying asbestos case, but it covers only the opinion index under the exact string 'USS YMS-1'. The remaining three base queries returned pacing stand-down rather than results and are access gaps, not negative findings. No asbestos-qualified variants were run: the completed base query returned 11 results (no 20-result overflow) and every hit was a name collision, so no variant was authorized. The Standard Oil litigation documents sister hull YMS-12, not YMS-1, and is admiralty collision/insurance litigation - not exposure evidence of any kind.

    Atlas source

    true

    Evidence ID

    ev-uss-yms-1-yms1-11