Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
-
[1]research packet 1066-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-412-yms412-pkt-1066-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-412 page - construction timeline, specifications, commanding officer, disposition [other_primary]
- Locator
- NavSource 11/19412.htm header block, specifications block, commanding-officers table, DANFS note
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: 'YMS-1 Class Auxiliary Motor Minesweeper'; call sign Nan-Peter-Queen-Able; laid down 30 November 1943 by the Bellingham Marine Railway and Boat Building Co., Bellingham, WA; launched 3 June 1944; completed 16 September 1944; 'Transferred to the War Shipping Administration 13 May 1947 and sold. Fate unknown.' Specifications: displacement 270 t.; length 136'; beam 24' 6"; draft 8'; speed 15 kts.; complement 32; armament one 3"/50 dual purpose gun mount, two 20mm mounts, and two depth charge projectors; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Commanding officer table: LT J. H. Steinhart, USNR (1945). Page states 'There is no DANFS History currently available for YMS-412' and no photograph is held.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Bellingham yard construction trades (1943-44); crew (1944-47); post-sale civilian owners (1947-)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track official records and are corroborated here by uboat.net, the awards manual, and Special List 44. 'Completed 16 September 1944' is read as the in-commission date (consistent with uboat.net 'Commissioned' and the SL44 log-coverage start). Contains no asbestos content. The WSA-transfer wording is loose - WSA was abolished 1 September 1946 (see ev-08).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-01
-
[3]uboat.net Allied Warships, USS YMS-412 (YMS-412) - build milestones and disposal (secondary compilation) [other_primary]
- Locator
- uboat.net ship/9831 data table
- Finding type
- vessel_history
- Finding
- uboat.net record for this hull: built by Bellingham Marine Railway and Boatbuilding Co. (Bellingham, Washington); ordered 21 July 1943; laid down 30 November 1943; launched 3 June 1944; commissioned 16 September 1944; 'Sold on 13 May 1947'. No events or commanding officers listed for the vessel.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Bellingham yard construction trades (1943-44); crew (1944-47)
- Limitations
- Secondary compilation - the only located source carrying an 'ordered' date (21 July 1943), which is otherwise uncorroborated; milestones otherwise agree with NavSource. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-02
-
[4]National Archives, Special List 44 'List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947' - ship-number index (archives.gov PDF) [other_primary]
- Locator
- sl-44-ship-number.pdf, PDF page 121, 'YMS-412' row (137-page PDF)
- Finding type
- historical_record
- Finding
- Special List 44's ship-number index inventories US Navy deck logs for this hull: 'YMS-412 9/16/1944 6/30/1945'. Deck logs covering commissioning through 30 June 1945 therefore exist in NARA custody (RG 24 deck-log series, College Park).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-09-16 to 1945-06-30 (inventory coverage)
- Population
- Crew (1944-45 log window)
- Limitations
- The dates are log-coverage inventory dates, not asserted commissioning/decommissioning dates - the start coincides with commissioning but the 30 June 1945 end does not mark end of service: the awards manual (ev-04) documents operations through January 1946, so later logs exist but are not itemized for this hull in this index. The deck logs are paper records; the NARA online digitized-deck-log index lists no YMS-412 entry (numbered vessels appear there only under later names, and this hull was never named). PDF page 121 verified by direct download and text extraction.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-03
-
[5]Navy and Marine Corps Awards Manual, NAVPERS 15,790 (Rev. 1953), Part IV, Section 2(16) - official list of ships eligible for engagement stars (HyperWar transcription of the government manual) [other_primary]
- Locator
- Awards-IV-16.html Part IV Section 2(16) ship-eligibility list, 'YMS 412:' entry; Part III entries for P33-1 and P207 sub-operations (operation names and windows)
- Finding type
- vessel_history
- Finding
- The official Navy awards list credits YMS-412 with six WWII engagements: 13 Mar 45 - 14 Mar 45 under P33-1 ('Assault and occupation of Iwo Jima', operation window 15 Feb - 16 Mar 45); 12 Sep 45 - 24 Sep 45 under P207-5 (Wakanoura-Kiki, Honshu Area, window 11 Sep - 2 Oct 45); 28 Sep 45 - 25 Oct 45 under P207-3 (Nagoya, Honshu Area, window 28 Sep - 26 Oct 45); 5 Nov 45 - 11 Dec 45 under P207-18 (Fukuoka, Kyushu-Korea Area, window 13 Oct 45 - 11 Jan 46); 23 Dec 45 - 28 Dec 45 under P207-17 (Tsushima Straits, Kyushu-Korea Area, window 12 Oct 45 - 14 Apr 46); and 8 Jan 46 - 19 Jan 46 under P207-10 (Kure-Hiroshima, Honshu Area, window 27 Oct 45 - 26 Feb 46). The five P207 sub-operations belong to 'Minesweeping Operations Pacific' (23 Jun 45 - 2 Mar 46; one star for participation in one or more) - the post-surrender clearance of Japanese minefields in home waters.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945-1946 (credited operations); manual published 1953
- Population
- Crew during Iwo Jima assault-phase participation (Mar 1945) and Japanese-home-waters mine clearance (Sep 1945 - Jan 1946)
- Limitations
- An award-eligibility list, not a unit history: it documents credited participation windows, not day-by-day activity, position, or task organization. The Naval History Division itself flagged hundreds of entry errors in this manual for other operations (1950s correspondence re: Leyte Gulf/Lingayen entries; YMS-412's entries are not individually challenged). Dates verified in the actual transcription text, not via the commercial ribbon-vendor reproductions that circulate the same data. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-04
-
[6]Era inference built on: NavSource specifications (2 x GM 8-268A diesels, Snow & Knobstedt gear, 2 shafts; YMS-1 class); class literature (wooden hulls built at 35 yacht/boat yards); GAO HRD-80-2 Navy asbestos-use era documentation (ev-06) [other_primary]
- Locator
- NavSource 11/19412.htm specifications block; YMS-1 class descriptions; shipyards.json has no Bellingham entry
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel-powered auxiliary minesweeper completed September 1944 sits inside the Navy's documented asbestos-use era. Era-standard applications aboard a small diesel combatant of this type were diesel-exhaust lagging and machinery insulation in the engine space, gaskets and valve packing throughout piping systems, electrical insulation and panelboard, and brake linings on the sweep winch and windlass. As a diesel vessel with a wooden hull she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply, and her asbestos loading would be materially lighter than a steam vessel of the era.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Bellingham construction trades (1943-44); engine-room and repair-rated crew (1944-47); disposal/shipbreaking trades post-1947
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or abatement record located for YMS-412. Names era-standard applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-05
-
[7]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO documented that the Navy used asbestos insulation extensively aboard ships and did not begin substituting alternative insulation materials until the early 1970s - spanning this hull's entire construction (1943-44) and service era (1944-47).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1979
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, confirmed 2026-10-04) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-06
-
[8]Shipbuilding History (T. Colton), Bellingham Marine yard list - yard history and hull-by-hull production table; same table mirrored at Naval Marine Archive (navalmarinearchive.com) Bellingham page [other_primary]
- Locator
- shipbuildinghistory.com Bellingham yard table, YMS-412 row; navalmarinearchive.com/sbh/shipyards/small/bellingham.html (identical table)
- Finding type
- vessel_history
- Finding
- Builder context: Bellingham Marine Railway Co. was a boat-repair business dating to the early 20th century; became Bellingham Marine Railway and Boatbuilding Co. in 1921; merged with Bellingham Iron Works in 1941 to become Bellingham Shipyards; renamed Bellingham Marine after the war; closed 1963. The yard table lists YMS-412 (delivered 16-Sep-44, disposition 'Struck 1946') among wartime builds spanning the BYMS 17-20 minesweepers, BARS 9-12 rescue ships, YFN 698-703 lighters, the YMS 269-276 and 342-345 blocks, PCS 1462-1463 subchasers, ATR 68-73 tugs, YTL yard tugs, YO 216-217 tankers, and YP 641-642 patrol craft.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947 (build window); yard history 1900s-1963
- Population
- Bellingham yard construction trades (1943-44)
- Limitations
- Secondary compilations - Colton's list and the Naval Marine Archive page carry identical table data (shared underlying compilation). The 'Struck 1946' disposition conflicts with the NavSource/uboat 13 May 1947 disposal - see ev-08 and gaps. Contains no asbestos content; no yard-level asbestos documentation exists for this small yacht/boat yard (contrast: NIOSH-surveyed yards like Electric Boat).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-07
-
[9]Disposition cross-check: NavSource 11/19412.htm ('Transferred to the War Shipping Administration 13 May 1947 and sold'); uboat.net ship/9831 ('Sold on 13 May 1947'); shipbuildinghistory.com / navalmarinearchive.com yard lists ('Struck 1946') [other_primary]
- Locator
- NavSource header disposition line; uboat.net 'History' field; shipbuildinghistory.com/Naval Marine Archive Bellingham table disposition column
- Finding type
- historical_record
- Finding
- DISPOSITION CONFLICT: NavSource and uboat.net date the disposal 13 May 1947 (NavSource frames it as a War Shipping Administration transfer and sale); the yard-production tables say 'Struck 1946'. A May 1947 disposal would have been administered by the U.S. Maritime Commission - the War Shipping Administration was abolished 1 September 1946 - so NavSource's 'WSA' wording is loose usage for the successor disposal channel. Both variants are carried; the record does not assert which event (striking vs transfer/sale) each source dates.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1946-1947 (disposition window)
- Population
- Disposal/shipbreaking or civilian-owner trades post-1947
- Limitations
- No registry-level document was located for the striking or disposal event (NVR excludes vessels disposed before 1987; no NVR entry exists; no DANFS entry exists). The buyer, flag, and ultimate fate of the hull after the 1947 sale are unlocated - 'fate unknown' stands. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-08
-
[10]Batch-9051 search ledger (this record): NavSource; uboat.net; NARA Special List 44 ship-number PDF (p.121 verified); NARA online deck-log index; NAVPERS 15,790 (HyperWar transcription); shipbuildinghistory/Naval Marine Archive yard lists; GAO product page; CourtListener (blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-412-yms412-01 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 YMS-412 was found in the public sources searched. CourtListener: exact-phrase 'YMS-412' opinion query returned 0 results and exact-phrase 'USS YMS-412' docket query returned 0 results (verified negatives on both indexes); the 'YMS-412' docket and 'USS YMS-412' opinion queries were attempted repeatedly and paced out each time (fleet budget ~58/hr shared across sessions) - logged as blocked, not as negative results (the 'USS' opinion query is bounded by the completed hull-opinion negative). Secondary web sweeps surfaced no qualifying case and no hull-specific 'asbestos aboard' marketing page for YMS-412 (generic asbestos-ship listicles exist - excluded by source policy).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - and the hull-level docket index is a genuine open gap (paced out, not run; the name-level docket index is verified negative). The 9/16/1944-6/30/1945 deck logs, builder construction records, and any 1947 disposal/survey files are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-412-yms412-09