Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
-
[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-411-yms411-pkt-1066-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-411 - construction, completion, disposal, specs, commanding officer (live page verified 2026-10-04) [other_primary]
- Locator
- NavSource 11/19411.htm header block, specifications block, commanding-officer table
- Finding type
- vessel_history
- Finding
- Documented for this hull: 'YMS-411 served the Navies of the United States and the Philippines'; YMS-1 Class Auxiliary Motor Minesweeper; laid down 10 October 1942 by the Bellingham Marine Railway and Boat Building Co., Bellingham, WA; launched 22 April 1944; completed 9 August 1944; struck from the Naval Register 28 August 1946; 'Transferred to the State Department, Foreign Liquidation Commission 29 December 1947 and sold to the Philippines. Fate unknown.'; call sign NPNU (Nan-Peter-Nan-Uncle); commanding officer LT J. P. Higgins, USNR (1945); 'There is no DANFS history available for YMS-411.' Spec block: 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, two depth charge projectors; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. No image of the hull is posted on the page.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Bellingham yard construction trades (1943-44); crew (Aug 1944 - 1946)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates track NVR/DANFS-era data. Its laid-down date (10 Oct 1942) conflicts with uboat.net (10 Oct 1943, ordered 21 Jul 1943) and predates that order date - assessed as a probable typo, see ev-09 and gaps. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-01
-
[3]uboat.net Allied Warships, USS YMS-411 (YMS-411) - milestones table (live page verified 2026-10-04) [other_primary]
- Locator
- uboat.net ship page 9830, milestones table ('History' lines)
- Finding type
- vessel_history
- Finding
- uboat.net documents for this hull: built by Bellingham Marine Railway and Boatbuilding Co. (Bellingham, Washington); ordered 21 July 1943; laid down 10 October 1943; launched 22 April 1944; commissioned 9 August 1944; 'Stricken on 28 August 1946'; 'Sold to the Philippines on 29 December 1947.' The page lists no commanding officers and no notable events for this hull.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Crew (1944-1946)
- Limitations
- uboat.net is a curated secondary database (Gudmundur Helgason) compiled from operational records - not a primary document; the deck logs (ev-03) would be the primary record. Its laid-down and ordered dates are internally consistent and conflict with NavSource on the laid-down year (see ev-09, gaps). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-02
-
[4]National Archives Special List #44 - List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (ship-number ordering), PDF page 121 [other_primary]
- Locator
- sl-44-ship-number.pdf p. 121, entry 'YMS-411 8/9/1944 6/30/1945'
- Finding type
- historical_record
- Finding
- NARA's official inventory lists one deck-log entry for YMS-411: coverage 9 August 1944 - 30 June 1945, spanning her completion/commissioning (9 Aug 1944) through the end of the Pacific war, including her assignment to Minecraft, Pacific Fleet (ev-04). The logs are held at NARA in the deck-log series inventoried by Special List 44 (Records of the Bureau of Naval Personnel, RG 24).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-08-09 to 1945-06-30
- Population
- Crew (Aug 1944 - Jun 1945); names and daily movements inside the undigitized log
- Limitations
- Inventory entry only - the logbook itself is not digitized on the National Archives 'Navy Deck Logs Available Online' listing (checked 2026-10-04; only named ex-YMS vessels appear there), so its contents are an unexamined primary source. YMS-411 served until mid-1946 (struck 28 Aug 1946), but no post-30-June-1945 logbook for her appears in this inventory - whether later logs exist in another accession series is unresolved. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-03
-
[5]NHHC, 'United States Pacific Fleet Organization, 1 May 1945' - MINECRAFT, PACIFIC FLEET section, YMS roster (official document transcription hosted by NHHC) [nhhc_danfs]
- Locator
- NHHC Online Reading Room page, 'MINECRAFT, PACIFIC FLEET' YMS roster row '94 | YMS 411 | Lt. (jg) J. P. Higgins (USNR)'; 'TACTICAL ORGANIZATION' table row 'Task Force 94 | Forward Area, CentPac'
- Finding type
- vessel_history
- Finding
- The 1 May 1945 Pacific Fleet organization lists 'YMS 411' under MINECRAFT, PACIFIC FLEET (Commander Minecraft, Pacific Fleet: Rear Admiral A. Sharp) in the YMS roster, with commanding officer 'Lt. (jg) J. P. Higgins (USNR)' and assignment code '94' in the leading column. The same document's tactical-organization table maps 'Task Force 94' to 'Forward Area, CentPac' (V. Adm. J. H. Hoover). This places the hull in U.S. Pacific Fleet service under the minecraft commander in spring 1945, consistent with her September 1945 post-surrender minesweeping credits (ev-05) and her later disposal in the Philippines (ev-01, ev-02).
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945-05-01
- Population
- Crew under Lt. (jg) J. P. Higgins, USNR (spring 1945)
- Limitations
- Organizational document: it establishes fleet assignment and commanding officer as of 1 May 1945, not geographic position or operations performed. The leading-column codes are not labeled by a column header in the transcription; the '94' = Task Force 94 (Forward Area, Central Pacific) reading matches the document's own tactical-organization table but is an interpretive link - hence partial. The CO corroborates NavSource's LT J. P. Higgins, USNR (1945) listing. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-04
-
[6]Secondary reproduction of U.S. Navy WWII campaign/battle-star data (officialmilitaryribbons.com, 'Navy Ship World War 2 Campaign Battle Stars, YMS 362 to YMS 481') [other_primary]
- Locator
- Page block 'YMS 411:' - two credit rows (P207 Minesweeping Operations Pacific, 4 Sep-8 Sep 45; 11 Sep-14 Sep 45)
- Finding type
- historical_record
- Finding
- A secondary compilation of Navy WWII campaign-credit data lists two entries for YMS-411, both 'P207 - Minesweeping Operations Pacific': 4 September - 8 September 1945 and 11 September - 14 September 1945 - post-surrender minesweeping operations in the Pacific. Neighboring hulls in the same table carry sub-designated P207 credits naming Japanese operating areas (e.g., P207-3 Nagoya, P207-5 Wakanoura-Kiki, P207-9 Kobe, P207-18 Fukuoka); YMS-411's entries carry the bare P207 code without a named sub-area.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945-09-04 to 1945-09-14
- Population
- Crew (Sep 1945)
- Limitations
- Commercial vendor page reproducing official Navy battle-star/campaign-credit data - not itself an authoritative source, and the reproduction is unverified against the OPNAV source document. The Pacific minesweeping credits are consistent with her Minecraft-PacFlt assignment (ev-04) but do not identify the operating area. The credit dates fall after the inventoried deck-log range ends (30 Jun 1945) - the logs that would document these operations are not in the SL-44 inventory. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-05
-
[7]shipbuildinghistory.com (Tim Colton yard compilation), Bellingham yard table and yard-history narrative; mirrored table at navalmarinearchive.com (sbh/smallships/ym.html) [other_primary]
- Locator
- bellingham.htm yard-history paragraph and yard table row for YMS 411; mirror row 'YMS | 411 | Bellingham Iron Works | Bellingham WA | 136 | 320 | 9-Aug-44 | To the Philippines 1947' at navalmarinearchive.com/sbh/smallships/ym.html
- Finding type
- vessel_history
- Finding
- The Bellingham yard table carries the row 'YMS | 411 | ... | Bellingham WA | 136 | ... | 9-Aug-44 | To the Philippines 1947, disposition unknown' - corroborating the 9 Aug 1944 completion/delivery and the 1947 Philippines transfer. The yard narrative documents the builder's naming history: Bellingham Marine Railway Co. became Bellingham Marine Railway and Boatbuilding Co. in 1921 and merged with Bellingham Iron Works in 1941 to form Bellingham Shipyards - reconciling the builder-name variants across secondary sources (NavSource 'Bellingham Marine Railway and Boat Building Co.'; navalmarinearchive mirror table 'Bellingham Iron Works') as the same Bellingham WA yard site.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Bellingham yard construction trades (1943-44)
- Limitations
- Secondary yard compilation (Tim Colton), not a primary registry. The table gives delivery dates, not laid-down dates, so it does not resolve the 1942-vs-1943 laid-down conflict. Yard-name variants refer to one site per its own narrative. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-06
-
[8]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) - product-page highlights [gao]
- Locator
- GAO product page HRD-80-2, Highlights section (full report PDF blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's efforts to protect workers from asbestos exposure at the Long Beach and Norfolk Naval Shipyards, including 'the use of asbestos in Navy ships'; the product-page highlights document that the Navy's 1975 policy was to 'remove and replace with nonasbestos materials only insulation that was damaged or had to be removed to accomplish necessary repairs,' modified in 1979 to include selectively replacing asbestos insulation in high-maintenance areas where repairs would be expected during a ship's next operating cycle - i.e., asbestos insulation was present and managed (not systematically removed) aboard Navy ships through the era covering this hull's construction (1943-44) and U.S. service (1944-46).
- 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 from the product-page highlights; supports era context only, not any fact specific to this hull - the reviewed fieldwork yards were Long Beach and Norfolk, not Bellingham. Full report PDF not retrieved (gao.gov/assets returns HTTP 403 to automated fetch, confirmed 2026-10-04).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-07
-
[9]Era inference built on: NavSource spec block (2 x GM 8-268A diesels, 880 bhp; wooden-hulled YMS-1-class per the NavSource YMS/BYMS index class description - 481 ships of the type, built at 35 yacht yards); uboat.net class data; GAO HRD-80-2 (see ev-07) [other_primary]
- Locator
- NavSource 11/19411.htm spec block and 11/19idx.htm class description; uboat.net YMS class data
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel-powered motor minesweeper completed in 1944 sits inside the Navy's documented asbestos-use era; era-standard applications aboard a small diesel combatant of this type and period were exhaust-system lagging, machinery and engine gaskets, valve packing, electrical insulation, and brake linings on winch and sweep gear. As a diesel vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply - and her wooden hull lacked the pipe runs and hull insulation typical of steel steam ships, narrowing (not eliminating) the era-typical asbestos applications.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- Bellingham construction trades (1943-44); crew (1944-46); Philippine Navy crew (1947 onward)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for YMS-411. 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-411-yms411-08
-
[10]Laid-down-date cross-check: NavSource YMS-411 page ('Laid down 10 October 1942'); uboat.net ship 9830 ('Ordered 21 Jul 1943 / Laid down 10 Oct 1943'); shipbuildinghistory Bellingham yard table (delivery dates only); sister-hull sequence check via same table (YMS 410 delivered 18-Sep-44, YMS 412 delivered 16-Sep-44, YMS 413 delivered 26-Oct-44) [other_primary]
- Locator
- NavSource 11/19411.htm header block; uboat.net ship 9830 milestones table; shipbuildinghistory.com Bellingham yard table
- Finding type
- historical_record
- Finding
- CONFLICT NOTED: NavSource prints 'Laid down 10 October 1942' while uboat.net prints 'Ordered 21 July 1943, laid down 10 October 1943.' A hull cannot be laid down before it is ordered, so the two sources cannot both be right; the 1943 date is internally consistent with the documented order date and with the Bellingham build sequence (sisters YMS-410/-412/-413 delivered Sep-Oct 1944 on the same contract block), and the NavSource 1942 printing is assessed as a probable one-year typo. The record carries 1943-10-10 with the variant retained in gaps.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943
- Limitations
- Corrects/flags a milestone conflict, not a material or asbestos claim. Neither source is a primary registry; the contract/order documents would settle it. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-09
-
[11]Batch-9050 search ledger (this record): NavSource; uboat.net; NARA Special List 44 PDF; NARA digitized-deck-log listing; NHHC U.S. Pacific Fleet Organization 1 May 1945; NHHC Pacific Typhoon extract (probed - hull not listed); NHHC DANFS probe; NVR live probe; NavalCoverMuseum; battle-star compilation; shipbuildinghistory Bellingham table + navalmarinearchive mirror; secondary web litigation sweep; CourtListener (partially run - see search_ledger sl-15) [other_primary]
- Locator
- search_ledger rows sl-uss-yms-411-yms411-01 through -15
- 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-411 was found in the public sources searched. The CourtListener base query that completed ('USS YMS-411', opinion search) returned 0 results; the remaining three base queries could not be run this session - the fleet-wide pacing budget stayed spent through spaced retries (helper exit 2; shared ~58/hr cap under fleet load) - logged as blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced only law-firm marketing content (generic minesweeper/navy-ship listicles at mesothelioma.com, asbestos.com, mesotheliomahope.com, mesotheliomaveterans.org and similar) asserting asbestos without primary sourcing - excluded by source policy - plus name collisions (e.g., Datsun 410/411 automobile forums). No Philippine Navy name for this hull was located in any source searched.
- 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 litigation repository search is only partially run (1 of 4 base queries; remaining 3 blocked, a genuine open gap). Deck logs (NARA, undigitized), Bellingham work packages, and Philippine-service records are open leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-411-yms411-10