Evidence
15 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-15).
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[1]research packet 1074-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-6-yms6-pkt-1074-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-6 (11/19006) - construction timeline, specifications, disposal, Shanghai photograph; states 'There is no DANFS history available for YMS-6' [other_primary]
- Locator
- NavSource 11/19006.htm - header block, specifications block, photo captions
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 8 August 1941 by Henry B. Nevins Inc., City Island, NY; launched 19 May 1942; completed 18 June 1942; struck from the Naval Register 19 June 1946; transferred to the State Department, Foreign Liquidation Commission in October 1947; 'Fate unknown.' Specifications: displacement 270 t.; length 136'; beam 24'6"; draft 8'; speed 15 kts.; complement 32; armament one 3"/50 dual-purpose 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. Call sign Nan-Able-King-Easy. Photograph documents YMS-6 moored with YMS-338, YMS-8, YMS-53 and YMS-51 along the Huangpu River, Shanghai, China, 28 December 1945 (collection of LTJG Jack W. Norris, XO, YMS-56). Launching photo credited to the City Island Nautical Museum.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Nevins construction trades (1941-42); wartime crew (1942-46); post-war China sweep crew (1945-46)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track official sources but 'struck 1947' appears in another secondary yard table (shipbuildinghistory), so the 19 June 1946 strike date rests on this page plus navypedia concurrence. Contains no asbestos content. The Shanghai photograph establishes presence at that date, not the duration of China service. NavSource lists '880bhp' for the pair of GM 8-268A engines while class literature gives ~440 bhp per engine - see gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-01
-
[3]uboat.net Allied Warships, USS YMS-6 (YMS-6) - ordered date, commanding-officer list, Operation Oboe VI task-organization and Lutong convoy-screen entries transcribed from the CTG 78.1 operation report and CTU 76.20.50 action report [other_primary]
- Locator
- uboat.net ship page 9426 - warship data table, Commands table, 'Notable events' (10 Jun 1945 Oboe VI; 20 Jun 1945 Lutong)
- Finding type
- vessel_history
- Finding
- uboat.net documents for this hull: ordered 1 April 1941; commissioned 18 June 1942; stricken 19 June 1946. Commanding officers (WWII section): Lt.(jg) Andrew E. Downing USNR (18 Jun 1942 - mid 1943); Lt.(jg) Robert K. Dean USNR (mid 1943); Charles Henry Romig USNR (mid-late 1943); S. H. Moore USNR (late 1943 - early 1944); James Howard Skog USNR (early 1944 - mid 1945); M. McVickar USNR (mid-late 1945). For Operation Oboe VI (Brunei landings, 10 June 1945), the transcribed CTG 78.1 report places USS YMS-6 (Lt. M. McVickar, USNR) in Task Unit 78.1.54, Sweep Unit Four, with YMS-259, YMS-313 and YMS-314; the minesweeping group had arrived off Brunei Bay the morning of 7 June and swept 34 contact mines at the southwestern entrance that day. For the Lutong landings (20 June 1945), YMS-6 screened Task Unit 76.20.50's return to Brunei Bay on 21 June alongside YMS-4, YMS-51, YMS-68, YMS-259, YMS-313 and YMS-340 (CTU 76.20.50 action report).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1946
- Population
- Crew under Lt. M. McVickar (1945 Borneo operations)
- Limitations
- uboat.net is a secondary compilation, not a primary source - its value is transcription of the underlying NARA action reports (CTG 78.1 Oboe VI report; CTU 76.20.50 Lutong report), which it cites. The unit-level mine counts are Task Unit/parent-unit results, not YMS-6's individual sweep tally. No asbestos content. The 'ordered 1 Apr 1941' date and the CO roster are secondary-only and unverified against commissioning records.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-02
-
[4]NARA catalog NAID 101751954 - 'USS YMS-6 - Rep of opers in support of the assault landings in the Brunei Bay Area, Borneo, 6/7-12/45'; RG 38 (Records of the Office of the Chief of Naval Operations), series 'World War II War Diaries, Other Operational Records and Histories' (NAID 4697018), microfilm Roll A1762, 10 digital objects; National Archives at College Park [other_primary]
- Locator
- catalog.archives.gov record page NAID 101751954; Roll A1762
- Finding type
- historical_record
- Finding
- NARA holds this hull's own action report covering minesweeping operations in support of the Brunei Bay assault landings, 7-12 June 1945 (Operation Oboe VI) - a ship-authored primary record of her part in the operation documented secondarily via uboat.net (Sweep Unit Four, TU 78.1.54).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-06-07 to 1945-06-12
- Population
- YMS-6 crew, June 1945
- Limitations
- Catalog metadata verified via the National Archives Catalog records API (page resolves HTTP 200). The report's text was not extracted this session - title-level description only. An action report documents operations, not materials; no asbestos content expected or established. Digitized microfilm frames exist (10 objects).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-03
-
[5]NARA catalog NAID 101751950 - 'USS YMS-6 - Rep of action with enemy shore batteries off Tarakan Island, Borneo, 5/2/45'; RG 38, series 'World War II War Diaries, Other Operational Records and Histories' (NAID 4697018), microfilm Roll A1762, 3 digital objects; National Archives at College Park [other_primary]
- Locator
- catalog.archives.gov record page NAID 101751950; Roll A1762
- Finding type
- historical_record
- Finding
- NARA holds this hull's own report of action with enemy shore batteries off Tarakan Island on 2 May 1945 - placing YMS-6 in the Operation Oboe I Tarakan assault, the opening landings of the Borneo campaign.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-05-02
- Population
- YMS-6 crew, May 1945
- Limitations
- Catalog metadata verified via the National Archives Catalog records API (page resolves HTTP 200); report text not extracted this session. Documents a combat action, not materials aboard. No asbestos content expected or established.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-04
-
[6]NARA catalog NAID 192869661 - 'YMS-6, 6/19/42-4/30/46'; RG 24 (Records of the Bureau of Naval Personnel), series 'Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities' (NAID 594996), microfilm Roll 7971; 223 digital objects scanned under the NARA-Ancestry partnership; National Archives at College Park [other_primary]
- Locator
- catalog.archives.gov record page NAID 192869661; Roll 7971
- Finding type
- historical_record
- Finding
- NARA holds this hull's muster rolls covering 19 June 1942 - 30 April 1946 - the personnel roster record for the ship's entire commissioned life, digitized (223 frames). This is the crew-population documentation for any later exposure analysis.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-06-19 to 1946-04-30
- Population
- All hands aboard YMS-6, 1942-46
- Limitations
- Muster rolls document who was aboard, not materials or exposure conditions. Catalog metadata verified via records API; frames are digitized but were not individually reviewed. The 6/19/42 start date matches the completion/commissioning milestone within one day.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-05
-
[7]NARA catalog NAID 77597372 - 'COMTASK-UNIT 78.1.5 - Report of minesweeping operations in support of the assault landings in the Brunei Bay & Miri-lutong Area, Borneo, 6/7-17/45'; RG 38, WWII War Diaries series (NAID 4697018), Roll A1990, 52 digital objects [other_primary]
- Locator
- catalog.archives.gov record page NAID 77597372; Roll A1990
- Finding type
- historical_record
- Finding
- NARA holds the parent-unit report (Task Unit 78.1.5, the minesweeping group for the Brunei/Miri-Lutong landings) covering 7-17 June 1945 - the unit record that contains YMS-6's sweep-unit operations in detail beyond her own action report.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-06-07 to 1945-06-17
- Population
- Sweep Unit Four crews (YMS-6, YMS-259, YMS-313, YMS-314), June 1945
- Limitations
- Unit-level report: documents the sweep group's operations, with YMS-6's contribution embedded inside TU 78.1.54 - not a hull-authored record. Catalog metadata verified via records API; text not extracted this session. No asbestos content expected or established.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-06
-
[8]NARA deck-log resources / logbooks finding aid (archives.gov/research/military/logbooks/navy and navy-online) - NARA inventories US Navy deck logs for YMS-6 covering 6/19/1942-5/31/1945 (RG 24 logbooks entry); the catalog's ship-level inventory underlies the task-order date range [other_primary]
- Locator
- archives.gov deck-logs finding aid; NARA catalog search q="YMS-6" (muster-roll sibling verified, deck-log items pending)
- Finding type
- historical_record
- Finding
- NARA's deck-logs inventory covers YMS-6 logbooks for 19 June 1942 - 31 May 1945 - the daily-position and weather/operations record for her whole wartime career, and the authoritative source for her undocumented 1942-44 movements (Atlantic shakedown, transit to the Pacific, and pre-Borneo operations).
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-06-19 to 1945-05-31
- Population
- YMS-6 crew, 1942-45
- Limitations
- Inventory-level finding: the per-month logbook catalog items under the Logbooks of U.S. Navy Ships and Stations series (NAID 594258) were not individually enumerated via the records API this session; the coverage window is as inventoried in the task order/NARA finding aid. Deck logs record operations and locations, not materials - no asbestos content expected or established. Log coverage dates are not commissioning/decommissioning dates.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-07
-
[9]NHHC DANFS, Waxbill II (YMS-479) - documents the YMS-1 class as 'wooden-hulled, unnamed motor minesweeper'; class spec block (dp. 320; l. 136'0"; b. 24'6"; dr. 6'1" max; s. 12 k.; cpl. 33; a. 1 3", 2 20mm; cl. YMS-1) [nhhc_danfs]
- Locator
- DANFS Waxbill II page, spec block and first paragraph
- Finding type
- vessel_history
- Finding
- DANFS (NHHC) documents the construction class to which YMS-6 belongs as wooden-hulled, unnamed motor minesweepers - material context for the asbestos envelope: wood construction, not steel. The class spec block for a sister hull gives cpl. 33 and 12 kt., mild variance with NavSource's 32 / 15 kt. for this hull.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1946 (class era)
- Population
- YMS-1-class crews (class context)
- Limitations
- Sister-ship DANFS entry used strictly for class material context (wooden hull); YMS-479 was built by a different yard (Mojean & Ericson, Tacoma) and later than YMS-6 - details of her service do not transfer. No asbestos content. YMS-6 herself has no DANFS entry (NavSource states; NHHC URL 404 verified 2026-10-05).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-08
-
[10]Hobart Hughes, 'Saga of a YMS', U.S. Naval Institute Proceedings, Vol. 74/1/539, January 1948 - contemporaneous officer's account of sister boat YMS-238: plant, complement, habitability [other_primary]
- Locator
- USNI Proceedings online, 'Saga of a YMS' (YMS-238 narrative)
- Finding type
- historical_record
- Finding
- A serving officer's January 1948 Proceedings account describes the class plant as all-diesel: 'two General Motors Diesels for main propulsion... electro-pneumatically controlled from the bridge. There was a similar Diesel direct-connected to a generator for magnetic minesweeping, while two Hercules 30-KW Diesels furnished electric power for the galley, for ventilating, and for other auxiliary equipment.' Crew 'thirty enlisted men and four officers' in quarters 'very cramped and uncomfortable' with a 'wholly inadequate ventilating system' - the confined-space context that would govern any insulation-fiber pathway aboard a boat of this class.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1943-1945 (account period); published Jan 1948
- Population
- YMS-1-class crews (class context)
- Limitations
- Describes YMS-238 specifically, not YMS-6 - class-level context only; individual boats varied in fit and machinery details. A memoir-style magazine article, not a design specification. No asbestos content; ventilation/habitability detail is contextual, not evidence of material.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-09
-
[11]Era inference built on: NavSource spec block (2 x GM 8-268A diesels, 2 shafts); DANFS class documentation (wooden-hulled motor minesweeper); USNI Proceedings 1948 class account (all-diesel plant, no steam); shipbuildinghistory/navypedia yard tables [other_primary]
- Locator
- NavSource 11/19006 spec block; DANFS Waxbill II (class); USNI Proceedings Jan 1948
- Finding type
- asbestos_application
- Finding
- A wooden-hulled, diesel-powered minesweeper built 1941-42 sits inside the Navy's documented asbestos-use era, but with a narrower envelope than steam vessels: there is no boiler or steam-plant lagging pathway. Era-standard applications aboard a craft of this type and period were engine exhaust lagging, machinery gaskets and valve packing, electrical insulation, and interior paneling/decking materials in the cramped wooden hull.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Nevins construction trades (1941-42); wartime crew (1942-46); any FLC-era disposal workforce (1947)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for YMS-6. Names era-standard applications, not confirmed installed materials. No quantity. The wooden hull and absence of steam plant materially reduce - but do not eliminate - the plausible asbestos footprint relative to a steel steam vessel.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-10
-
[12]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2
- 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 (1941-42) and service era (1942-46).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- 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) - content via product-page description, per standing batch practice.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-11
-
[13]Mystic Seaport Museum Archives, 'Henry B. Nevins, Inc. Shipyard Collection' - surviving builder records for the yard that built this hull [museum_official]
- Locator
- Mystic Seaport ArchivesSpace resource 220
- Finding type
- historical_record
- Finding
- Mystic Seaport Museum holds the Henry B. Nevins, Inc. Shipyard Collection - the surviving business/construction records of the yard that designed the YMS-1 class prototype and built YMS-6. The collection is the authoritative archival lead for any construction-era material documentation (specifications, purchase orders, subcontractor records) for this hull and its 23 Nevins-built sisters.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- yard active 1907-1962; YMS-6 build 1941-42
- Population
- Nevins construction trades (1941-42)
- Limitations
- Collection-level description only; contents not inventoried to the contract level in this session. Yard records may or may not name materials by product - presence of a collection is not evidence of asbestos documentation within it.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-12
-
[14]Batch-9140 search ledger (this record): NavSource hull page and class index; uboat.net ship page; NARA catalog records API (muster rolls NAID 192869661, action reports NAID 101751950/101751954, unit report NAID 77597372); NARA deck-logs finding aid; NHHC DANFS (404 for this hull; Waxbill II class entry); NVR (no entry); CourtListener via fleet helper; secondary web sweeps; Mystic Seaport ArchivesSpace [other_primary]
- Locator
- search_ledger rows sl-uss-yms-6-yms6-01 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-6 was found in the public sources searched. CourtListener partial coverage: the exact-name opinion query '"USS YMS-6"' (type=o, limit 20) returned zero results on 2026-10-05; the remaining three base queries ("USS YMS-6" type=r, "YMS-6" type=o, "YMS-6" type=r) were blocked by fleet-wide pacing-budget exhaustion (helper exit 2 on multiple spaced attempts) - logged as blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced no qualifying case; the only 'asbestos aboard minesweepers' material is law-firm marketing content (mesothelioma.com, mesothelioma.net, mesotheliomaguide.com and similar listicles) asserting asbestos without primary sourcing - excluded by source policy.
- 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 - and the litigation repository search is only partially complete: zero opinion hits for the exact name is a real negative for that index, but the docket index and the bare-hull queries remain genuinely open (blocked, not run). The NARA action reports, muster rolls, and deck logs are the primary undigitized leads for any service-era detail; the Mystic Seaport yard collection is the lead for construction materials. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-13
-
[15]Strike-date cross-check: NavSource 'Struck from the Naval Register 19 June 1946'; navypedia 'stricken 6.1946'; navalmarinearchive Nevins yard table 'Struck 1946'; shipbuildinghistory YMS table 'struck 1947' [other_primary]
- Locator
- shipbuildinghistory.njscuba.net/us-navy-small/ym/ YMS-6 row; navalmarinearchive.com Nevins yard table; navypedia YMS table
- Finding type
- historical_record
- Finding
- CORRECTION: secondary yard tables split on the strike year - shipbuildinghistory carries 'struck 1947' for YMS-6 while NavSource, navypedia, and navalmarinearchive's own Nevins table agree on 1946 (NavSource gives the exact date, 19 June 1946). The '1947' reading likely conflates the Naval Register strike with the October 1947 Foreign Liquidation Commission transfer. This record carries 19 June 1946.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1946-1947
- Limitations
- Corrects a secondary-source date conflict, not a material claim. The Naval Register strike and FLC transfer are distinct events; only NavSource states the exact strike date. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-6-yms6-14