Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
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[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-41-yms41-pkt-1066-packet-md
-
[2]NARA Special List 44 - List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (by-ship-number PDF), RG 24 deck-log holdings inventory [other_primary]
- Locator
- sl-44-ship-number.pdf, PDF page 121 (downloaded and text-extracted 2026-10-04)
- Finding type
- historical_record
- Finding
- NARA inventories US Navy deck logs for YMS-41 covering 25 May 1942 - 10 August 1945 (row 'YMS-41 5/25/1942 8/10/1945' on PDF page 121 of sl-44-ship-number.pdf). This documents WWII Navy service within the 1930-1986 window; the dates are log-coverage dates, not asserted commissioning or decommissioning dates.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1945 (log coverage); inventory published for 1801-1947 holdings
- Population
- YMS-41 crew (1942-1945)
- Limitations
- Archival-holding inventory only: proves deck logs exist in RG 24 for this hull but does not make their contents available - no operational, medical, or material detail is established by this inventory. Digitization in the NARA catalog is unconfirmed (the public digitized-logs index is organized by vessel name; unnamed YMS hulls do not appear).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-01
-
[3]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-41 (11/19041) - milestone timeline, specifications, call sign, and CO-credited photography [other_primary]
- Locator
- NavSource 11/19041.htm header block, specifications block, photo captions (111904101-111904104)
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 28 June 1941 by 'Robert Jacobs, Inc., Long Island, NY'; launched 14 April 1942; completed 12 May 1942; struck from the Naval Register 19 June 1946; transferred to the State Department, Foreign Liquidation Commission in October 1947; fate unknown. Specs: 320 t, 136' x 24'6" x 6'1", 13 kts, complement 33; armament one 3"/50 DP mount, two 20mm mounts, two depth-charge tracks, two depth-charge projectors; propulsion two 880shp GM 8-268A diesels, Snow & Knobstedt single reduction gear, two shafts. Call sign Nan-Baker-William-Sugar. Photo captions credited to commanding officer LTjg George G. Rosendall, USNR (donated by Chris Rosendall) place the hull at Colon, Republic of Panama, 21 April 1945 (ship's party), and document her officers. Page states: no DANFS history available for YMS-41.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1941-1947
- Population
- Robert Jacob yard trades (1941-42); YMS-41 crew incl. CO LTjg George G. Rosendall USNR (1942-46); any Canal Zone base trades
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestones generally track official lists but the builder line prints the orthographic variant 'Robert Jacobs, Inc., Long Island, NY' (see correction row ev-10). No asbestos content. The Colon placement is a photo caption, not an operations record - it establishes presence, not assignment.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-02
-
[4]ShipbuildingHistory (T. Colton) Yard Minesweepers build table (njscuba mirror); corroborated by uboat.net Allied Warships, USS YMS-41 (ship/9461) [other_primary]
- Locator
- shipbuildinghistory.njscuba.net/us-navy-small/ym/ YMS-41 table row; uboat.net/allies/warships/ship/9461.html detail block
- Finding type
- vessel_history
- Finding
- Independent secondary corroboration: shipbuildinghistory's YMS build table lists 'YMS-41 | Robert Jacob | City Island NY | 136 | 320 | 12 May 1942 | struck 1946'. uboat.net's YMS-41 page lists: built by Robert Jacob Inc. (City Island, New York); ordered 1 April 1941; laid down 28 June 1941; launched 14 April 1942; commissioned 12 May 1942; stricken 19 June 1946; no commands or events listed.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1941-1946
- Population
- Robert Jacob yard trades (1941-42)
- Limitations
- Two secondary compilations corroborating NavSource milestones and adding the order date and the 'commissioned' characterization of 12 May 1942 - neither is a primary registry and uboat.net holds no operational detail for this hull. 'Struck 1946' in the build table is consistent with the 19 June 1946 NavSource/uboat date. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-03
-
[5]FDR Presidential Library Map Room, 'United States Fleet' disposition/organization chart, August 1943 (scanned PDF, mr0665) [other_primary]
- Locator
- fdrlibrary.marist.edu mr0665.pdf (43-page scan; search-index snippet verified, page-level OCR unrecoverable)
- Finding type
- historical_record
- Finding
- Search-index OCR of the August 1943 FDR Library fleet-disposition chart surfaces 'YMS 41' in Caribbean-area listings near Guantanamo entries (snippet: 'YMS 41. SC 541. YMS 66. SC 634... AA Training Center, Guantanamo, Cuba'). This is consistent with the Caribbean/Canal Zone employment indicated by the April 1945 Colon photograph.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-08
- Population
- YMS-41 crew (1943)
- Limitations
- PARTIAL VERIFICATION ONLY: the scanned chart's embedded text layer is too degraded for page-level text extraction - the subsection heading assigning YMS-41 to a specific command could not be recovered and the placement must not be cited as a confirmed assignment. A primary US government document held by a presidential library; the lead is real, the attribution is open.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-04
-
[6]New York Times, '2 Navy Ships Launched; Third Mine Sweeper to Go Down the Ways This Week' (14 April 1942) [reputable_press]
- Locator
- NYT archive URL, search-result snippet (accessed via search index; full text paywalled)
- Finding type
- vessel_history
- Finding
- Contemporary launch notice: 'The YMS-41 will be launched at 11:30 A.M. today at the City Island yards of Robert Jacob, Inc., where Miss Rose Italiano, an employe of the company, will [sponsor/christen]' - corroborating the 14 April 1942 launch date, the City Island yard, and naming the launch sponsor, a yard employee.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-04-14
- Population
- Robert Jacob yard employees and launch attendees (1942)
- Limitations
- Paywalled (TimesMachine) - verification is at search-snippet level; used solely to corroborate launch date/yard and the sponsor detail, not asserted beyond the visible text. Automated scrape unsupported on this domain.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-05
-
[7]Naval History and Heritage Command / National Museum of the U.S. Navy, 'YMS-445, 1945-47' exhibit page - official description of the YMS type's role and disposal pattern [museum_official]
- Locator
- NMUSN YMS-445 exhibit page, descriptive paragraph
- Finding type
- vessel_history
- Finding
- NHHC describes the YMS type: 'These yard craft patrolled navy yards and adjacent areas, and they were also used by the Allies as part of the Lend-Lease Program.' The page's disposal line for YMS-445 ('struck from the Naval Register... transferred to the War Shipping Administration with her fate unknown') illustrates the same small-craft surplus-disposal pattern under which YMS-41 went to the Foreign Liquidation Commission in 1947.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1942-1947
- Population
- YMS-type crews (1942-1947 era)
- Limitations
- Class/type context from an official Navy museum page describing a sister hull - does not document YMS-41 itself. No asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-06
-
[8]NavSource Auxiliary Motor Minesweeper (YMS) / British Motor Minesweeper (BYMS) Index - class-level construction and employment summary [other_primary]
- Locator
- NavSource 11/19idx.htm, class narrative and yard photo caption
- Finding type
- vessel_history
- Finding
- Class context: 'The wood-hulled YMS proved to be one of the U.S. Navy's more durable and versatile types...' - 481 US YMS hulls (561 total incl. BYMS) built at 35 yacht yards (12 East Coast, 19 West Coast, 4 Great Lakes); type not expected to operate beyond adjacent waters from base; used for inshore sweeping to prepare amphibious assaults and swept enemy-laid mines off Jacksonville FL and Charleston SC as early as 1942. YMS-1 through YMS-134 were the two-stack subgroup (YMS-41 falls in it). Surviving YMS were reclassified AMS and given names in 1947 - after this hull's 1946 striking, which is why no designation alias exists. The index also carries a July 1944 photograph of the Robert Jacob Shipyard, City Island, with YMS hulls under construction.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1941-1947
- Population
- YMS-class crews and builder-yard trades (1941-1947)
- Limitations
- Class-level secondary compilation - does not document this specific hull beyond the shared type characteristics it explicitly assigns to all 481 units. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-07
-
[9]GAO, Navy's Efforts to Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) - full text via firecrawl [gao]
- Locator
- GAO HRD-80-2 transmittal letter and findings; product page (full text via firecrawl)
- Finding type
- gov_survey
- Finding
- Program-level documentation spanning this hull's entire construction (1941-42) and service era (1942-46): 'according to the Navy, although all ships contain some asbestos in such components as clutches and electric cables, most ships delivered in the last several years or now under construction have little or no asbestos as thermal insulation, which was the Navy's major use of asbestos aboard ships.' Product specifications for thermal insulation were changed in 1973 to specify asbestos-free materials; ships were delivered with asbestos insulation as late as May 1978. Fieldwork yards were Long Beach and Norfolk Naval Shipyards.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1979 (report); use-era reaching back decades incl. 1941-46
- Population
- Navy shipyard workers; Navy-wide asbestos program review
- Limitations
- Program-level, not hull-specific - documents Navy-wide asbestos policy/use, not any fact about YMS-41. Fieldwork excluded small combatants and pre-1950 construction; used for era context only. Direct curl to gao.gov returns 403 (confirmed 2026-10-04); full text extracted via firecrawl.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-08
-
[10]Era inference built on: NavSource YMS-41 spec block (2x GM 8-268A diesels, no steam plant); NavSource class index (wood-hulled type, yacht-yard construction); GAO HRD-80-2 (Navy asbestos-use era; 'all ships contain some asbestos in such components as clutches and electric cables'; asbestos-free thermal-insulation specs only from 1973) [other_primary]
- Locator
- Composite: ev-02 spec block; ev-07 class index; ev-08 GAO report
- Finding type
- asbestos_application
- Finding
- A wood-hulled, diesel-powered motor minesweeper built 1941-42 sits inside the Navy's documented asbestos-use era, but with a materially smaller inventory than a steel steam combatant: era-standard applications aboard a small diesel vessel of this period were machinery and diesel-exhaust lagging in the engine spaces, gaskets, valve packing, electrical insulation, and winch/windlass brake linings. There is no steam plant - the boiler/turbine lagging pathway of larger combatants does not apply - and the wood hull carried no structural insulation.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1941-1947
- Population
- Robert Jacob yard trades (1941-42); engine-room ratings and crew (1942-46); any disposal/FLC handling trades (1946-47)
- Limitations
- Class/era inference only - no hull-specific material list, survey, or work package located for YMS-41. Names era-standard applications, not confirmed installed materials. No quantity. Deck logs (RG 24, 1942-45) are the unexploited primary lead.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-09
-
[11]Builder-name cross-check: NavSource YMS-41 page ('Robert Jacobs, Inc., Long Island, NY') vs shipbuildinghistory build table, uboat.net, NYT launch notice, and NavSource's own class-index yard caption ('Robert Jacob [Shipyard], City Island, NY') [other_primary]
- Locator
- NavSource 11/19041 header vs NavSource 11/19idx yard caption; shipbuildinghistory ym/ table; NYT 1942-04-14
- Finding type
- historical_record
- Finding
- CORRECTION: NavSource's YMS-41 milestone line prints 'Robert Jacobs, Inc., Long Island, NY'. The documented name is Robert Jacob, Inc. (Robert Jacob Shipyard), City Island, Bronx, New York - per the shipbuildinghistory build table, uboat.net, the April 1942 NYT launch notice, and NavSource's own class-index caption ('A view of the Robert Jacob Shipyard, City Island, NY, c. July 1944'). 'Long Island' is loose geography (City Island sits in Long Island Sound, Bronx); the yard name and location are carried as Robert Jacob, Inc., City Island.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1941-1942
- Limitations
- Orthographic/geographic correction, not a material claim - does not affect milestones or asbestos status. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-10
-
[12]Batch-9048 search ledger (this record): NARA SL44 PDF; NavSource hull + class pages; shipbuildinghistory + uboat.net corroboration; FDR Library chart (partial); NYT (partial); NHHC DANFS + photo index (no entry); NVR (out of coverage); NARA digitized-logs index (name-indexed, absent); GAO HRD-80-2 full text; secondary web litigation sweep; CourtListener (see sl-13) [other_primary]
- Locator
- search_ledger rows sl-uss-yms-41-yms41-01 through -14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming YMS-41 was found in the public sources searched. The hull is thinly documented generally - no DANFS entry exists, no NVR entry exists (pre-1987 disposal), and no NHHC photograph is indexed for it; its 1947 Foreign Liquidation Commission disposal left no hazmat record and its fate is unknown. Secondary web sweeps surfaced only generic navy/minesweeper law-firm marketing pages, none naming this hull - excluded by source policy. CAVEAT: CourtListener could not be queried this session - the fleet-wide request pacer returned 'budget momentarily spent' on every attempt across ~1.75 hours (7 attempts, exit 2 pacing, never a request through) - logged as blocked in search_ledger, not as a negative result.
- 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 - the 1941-42 construction date sits squarely in the Navy's documented asbestos-use era, and the RG 24 deck logs (1942-45) and any builder/FLC records are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-41-yms41-11