Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
-
[1]research packet 1076-packet.md (1 sources cited) [museum_official]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-7-yms7-pkt-1076-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-7 page (11/19007) - construction milestones, specification block, disposal line [other_primary]
- Locator
- NavSource 11/19007.htm header block and specifications block
- Finding type
- vessel_history
- Finding
- Documented for this hull: 'YMS-1 Class Auxiliary Motor Minesweeper: Laid down 31 October 1941 by Henry B. Nevins Inc., City Island, NY; Launched 11 May 1942; Completed 4 June 1942; Struck from the Naval Register 10 June 1947; Transferred to the War Shipping Administration in February 1948; 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, two depth-charge projectors; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Page states flatly: 'There is no DANFS history available for YMS-7.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1948
- Population
- Nevins construction trades (1941-42); wartime crew (1942-46)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track official records but no primary citation is shown. 'Completed' (not 'Commissioned') is its wording; NavalCoverMuseum and uboat.net carry 'Commissioned' for the same date. Contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-01
-
[3]NARA Catalog, file unit 'YMS-7, 6/2/42-4/30/46', NAID 192869885 - RG 24 (Records of the Bureau of Naval Personnel), Series: Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities (NAID 594996), HMS/MLRs A1 135-A; 232 images, digitized via NARA-Ancestry collaboration; microfilm Roll 7972 at NARA College Park; Access: Unrestricted [other_primary]
- Locator
- catalog.archives.gov/id/192869885; images 1-7 (reel-start card, N.Nav.5 forwarding sheet, Q2-1942 roll page)
- Finding type
- historical_record
- Finding
- The hull's complete wartime muster rolls are digitized and publicly viewable. Spot-verified page-level this session: image 3 is the N.Nav.5 forwarding sheet headed 'MUSTER ROLL OF THE CREW of the U.S.S. YMS-7' annotated 'Comm 6-15-42 to 4-30-46 Final'; image 7 is the muster roll for the quarter ending June 30, 1942, listing 19 enlisted crew by name, service number, rating, enlistment date, and place received aboard (e.g., 'Blythe, Thomas Earl, 658-17-60, GM3c, 6 Apr 1942, Norfolk Va.'). Roll coverage spans the hull's entire commissioned life (June 1942 through the 30 April 1946 final roll, the month of decommissioning).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-1946
- Population
- YMS-7 enlisted crew, June 1942 - April 1946 (all hands documented by name and rating across 232 images)
- Limitations
- Crew-presence documentation, not an exposure or material record: the rolls establish who served aboard and when - they contain no asbestos, material, or work-record content. Page-level verification covered the opening images only; individual quarterly rolls were not transcribed. 'Comm 6-15-42' annotation on the cover sheet is an archivist's/filmer's note that differs from the 6/4/1942 commissioned date and from the cataloged coverage start (6/2/42) - cataloged range carried.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-02
-
[4]NARA Special List #44 - 'List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947', ship-number index (archives.gov/research/military/logbooks/navy) [other_primary]
- Locator
- sl-44-ship-number.pdf, 'Special List #44, by Ship Numbers', YMS-7 row (p. sequence with YMS-62 through YMS-76 block)
- Finding type
- historical_record
- Finding
- NARA inventories US Navy deck logs for this hull: the Special List #44 ship-number table carries the row 'YMS-7, 6/6/1942 - 5/31/1945' (verified in the downloaded PDF). These are the commissioned-era deck logs - the hull's own chronological record of movements, drills, and maintenance - held at Archives II, College Park. YMS-7 does not appear on NARA's list of digitized deck logs (which for this class covers only the later bird-named AMS conversions), so the logs are paper/microfilm holdings, not yet online.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-1945 (inventory coverage)
- Population
- Wartime crew (1942-45 coverage window)
- Limitations
- Inventory-level documentation: Special List #44 establishes that deck logs exist and their coverage span - it does not publish their contents. Coverage ends 5/31/1945 though the hull served to April 1946; whether later logs exist elsewhere in the holdings is unresolved. Log coverage dates are not asserted to be commissioning/decommissioning dates.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-03
-
[5]uboat.net Allied Warships of WWII, 'USS YMS-7 (YMS-7)' (compiler Guðmundur Helgason) - build/milestone table, commanding-officer chronology, notable events (citing UK National Archives ADM 173/19286) [other_primary]
- Locator
- uboat.net ship/9427 - build table, 'Commands listed for USS YMS-7', 'Notable events'
- Finding type
- vessel_history
- Finding
- Documents for this hull: ordered 1 April 1941; laid down 31 October 1941 at Henry B. Nevins Inc., City Island NY; launched 11 May 1942; commissioned 4 June 1942; 'End service Apr 1946' - 'Decommissioned at Bremerton, Washington in the 2nd half of April 1946'; stricken 10 June 1947. Wartime CO chronology (all USNR): C. A. Stapleton (4 Jun 1942-early 1943), C. P. Haber (early-late 1943), Lt.(jg) C. J. Cavanagh (late 1943-late 1944), J. F. Mahoney (late 1944), Lt. C. J. Cavanagh (late 1944-mid 1945), L. Finkle (mid 1945), J. F. Mahoney (mid-late 1945). Notable event: 8 September 1944, HMS Upright (Lt. J.A.L. Wilkinson, RN) 'conducted A/S exercises off Argentia, most likely with USS YMS-7' - placing the hull at Naval Operating Base Argentia, Newfoundland, in September 1944 (source: ADM 173/19286).
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Wartime crew under seven documented commanders (1942-45)
- Limitations
- Volunteer-compiled secondary source, not a primary registry - its CO chronology carries '?' qualifiers on several date boundaries, and the Argentia event is stated as 'most likely' by the compiler. The underlying UK National Archives document (ADM 173/19286) was not independently read. The Bremerton decommissioning detail is unconfirmed by any US source read this session (muster-roll 'Final' at 4/30/1946 is consistent). Contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-04
-
[6]Library of Virginia, World War II Separation Notices: Navy - separation notice of Thomas Earl Blythe, GM1c (serial 658 17 60), transcribed on the FromThePage platform (LVA collection 1140040_002_150_001) [other_primary]
- Locator
- FromThePage LVA work 1140040_002_150_001, page display 35144741 ('Service Vessels and Stations' field)
- Finding type
- historical_record
- Finding
- A primary personnel record naming this hull: Blythe's Navy separation notice lists 'Service Vessels and Stations: NRS, NORFOLK, VA; NAS, NOB NORFOLK, VA; USS YMS 7; USS TAZEWELL (APA209)' - he entered service 6 April 1942 at Norfolk, separated honorable at Shelton, Virginia. Cross-verified independently: the same 'Blythe, Thomas Earl, 658-17-60' appears as GM3c aboard USS YMS-7 on the 30 June 1942 muster-roll page in NARA NAID 192869885 - two independent primary records placing the same named individual aboard this hull.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-1945
- Population
- GM1c Thomas Earl Blythe (crew, 1942-1945); by extension the documented crew population
- Limitations
- Crew-presence documentation only: a service assignment, not an exposure record - makes no claim of asbestos exposure for Blythe or any individual. Read via the FromThePage transcription layer; the underlying LVA scan was not independently examined.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-05
-
[7]NavSource Online: Auxiliary Motor Minesweeper (YMS) index - class history and construction summary for the YMS-1 type [other_primary]
- Locator
- NavSource 11/19idx.htm - 'Auxiliary Motor Minesweepers (YMS)' narrative block
- Finding type
- vessel_history
- Finding
- Class context: 'a total of 561 were built at various U.S. yards... Built at 35 yacht yards, rather than larger shipyards; 12 on the East Coast; 19 on the West Coast, and four in the Great Lakes.' All 481 US YMS hulls shared the same general characteristics - 136-foot wooden-hulled minesweepers; YMS-1 through YMS-134 (which includes YMS-7) carried the two-stack profile. YMS boats swept mines laid by enemy submarines off Jacksonville FL and Charleston SC as early as 1942; surviving hulls were reclassified AMS in 1947 and given bird names - YMS-7 was struck before reaching that program. The class prototype YMS-1 was designed and built at the same yard as this hull (Henry B. Nevins Inc., City Island).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- YMS-class construction trades at 35 yards; class-wide wartime crews
- Limitations
- Class-level background, not a hull record - establishes the type this hull belonged to and the wooden-hulled/diesel construction program. Volunteer compilation; contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-06
-
[8]Era inference built on: NavSource specification block (two GM 8-268A diesels, no steam plant; wooden-hulled construction); NavSource class index (136-ft wooden-hulled motor minesweeper built at a yacht yard, 1941-42); GAO HRD-80-2 Navy asbestos-era documentation (see ev-07) [other_primary]
- Locator
- NavSource 11/19007.htm specifications; NavSource 11/19idx.htm class narrative; GAO HRD-80-2 product page
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel-driven motor minesweeper built 1941-42 sits inside the Navy's documented asbestos-use era; era-standard asbestos applications aboard a small diesel craft of this type and period were machinery and diesel-exhaust insulation, gaskets, valve packing, and electrical insulation. The hull carried no boilers or steam plant - the boiler/turbine lagging pathway of steam vessels does not apply - and wooden-hull construction carried a smaller insulation footprint than steel combatants, but the confined machinery-space exposure dynamic applies on a 136-foot craft.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1948
- Population
- Nevins construction trades (1941-42); wartime crew (1942-46); disposal/WSA-era handlers (1946-48)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for YMS-7. Names era-standard applications, not confirmed installed materials. No quantity. No manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-07
-
[9]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 (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, confirmed 2026-10-05) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-08
-
[10]Batch-9151 search ledger (this record): NARA catalog (muster rolls digitized; deck-log inventory; war-diary sweep); NavSource ship page and class index; uboat.net; NavalCoverMuseum; shipbuildinghistory production table; Library of Virginia separation notice; GAO product page; CourtListener (paced); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-7-yms7-01 through -12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, veteran claim, or verified litigation naming USS YMS-7 was found in the public sources searched (see search_ledger). No law-firm listicle coverage of this hull was even located - the marketing sites that enumerate asbestos ship lists do not include YMS-7 in indexed results.
- 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. CourtListener status this session noted in search_ledger. Undigitized deck logs (Special List #44 coverage) and builder work papers are open archival leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-09
-
[11]Date-conflict check: shipbuildinghistory.com YMS production table (mirror: shipbuildinghistory.njscuba.net) row 'YMS-7 | Henry B. Nevins | City Island NY | 136 | 320 | 4 Jun 1942 | struck 1946'; Naval Marine Archive registry 'YMS 7 ... Struck 1946'; vs NavSource ship page / NavalCoverMuseum / uboat.net 'struck 10 June 1947' [other_primary]
- Locator
- shipbuildinghistory.njscuba.net/us-navy-small/ym/ YMS-7 table row; ships.navalmarinearchive.com/ships/84784; NavSource 11/19007.htm; navalcovermuseum.org/wiki/YMS_7; uboat.net ship/9427
- Finding type
- historical_record
- Finding
- CORRECTION on stricken date: secondary production tables carry 'struck 1946' for this hull (shipbuildinghistory YMS table; Naval Marine Archive registry), but three independent compilations carrying fuller record detail - NavSource, NavalCoverMuseum, and uboat.net - all give 10 June 1947, which is also consistent with the February 1948 War Shipping Administration transfer. The 1947-06-10 date is carried in this record; the '1946' variant is noted as a probable year-level truncation of the stricken/decommission sequence in the flat production tables.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1946-1947
- Limitations
- Corrects a circulating date conflict among secondary sources - all parties are secondary compilations; no primary Navy List page was read. 'Struck 1946' may reflect the decommission year rather than the register action. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-7-yms7-10