Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 1060-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-373-yms373-pkt-1060-packet-md
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[2]NavSource Online: Mine Warfare Vessel Photo Archive, Jackdaw (MSC[O] 21) ex-AMS-21 ex-YMS-373 - construction/milestone timeline, specifications, photographic record, commanding officers [other_primary]
- Locator
- NavSource 11/19373.htm header block, specifications block, 'Commanding Officers' table, and photo captions
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 28 December 1942 by Weaver Shipyards, Orange, TX; launched 29 January 1944; completed 28 April 1944; commissioned USS YMS-373 on 29 April 1944. Naval Vessel Register of 1 January 1949 lists plan for decommissioning and placing in reserve at San Diego, CA as February 1947. Named Jackdaw and reclassified Motor Minesweeper AMS-21 on 18 February 1947 (DANFS gives 17 February - see gaps). Reclassified Coastal Minesweeper (Old) MSC(O)-21 on 7 February 1955. Struck from the Naval Register 1 January 1960; transferred to Brazil 18 January 1960 and renamed Jurva (M-13). Specifications: 270 t., 136' x 24'6" x 8', 15 kts, complement 32; one 3"/50 DP mount, two 20mm mounts, two depth charge projectors (1947 fit: one 40mm, two twin .50 cal); two 880 bhp General Motors 8-268A diesels on Snow and Knobstedt single-reduction gear, two shafts. Photographic record: 16 May 1944 in the Gulf of Mexico from a ZP-22 blimp out of NAS Houma, LA (NARA photos 80-G-271210/271211); circa 1945 in San Francisco Bay; 16 April 1951 off Long Beach, CA (NH 93271). Postwar commanding officers: LT D. Ditzler (1950-Jan 1952), LT T. J. Murphy (Jan-Dec 1952), LT John Rives Crumpton Jr. (Dec 1952-1954).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1982
- Population
- Weaver construction trades (1942-44); USN crew (1944-1960); Brazilian Navy crew (1960/1963-1982)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry; milestone dates generally track NVR/DANFS but conflict with other sources on three points (launch date, naming date, Brazilian strike date - see gaps). No asbestos content. The 1 Jan 1949 NVR note records reserve status at San Diego as of February 1947 but does not give a decommissioning date; whether the ship recommissioned by 1950 is inferred from the commanding-officer list.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-01
-
[3]DANFS, 'Jackdaw' (NHHC; live page 404 on 2026-10-04, archived copy used); verbatim transcription also at losthistory.net/hazegray/danfs/mine/yms373.htm [nhhc_danfs]
- Locator
- NHHC DANFS 'Jackdaw' entry (Wayback capture 2022-09-30); hazegray transcription at /danfs/mine/yms373.htm
- Finding type
- vessel_history
- Finding
- DANFS entry (complete): 'Jackdaw - A common crow-like bird, easy to tame, that is noted for pilfering small articles. YMS-373, commissioned 29 April 1944 (q.v.), was re-classified AMS-21 and given the name Jackdaw 17 February 1947.' The entry also lists the two cancelled Admirable-class hulls of the same name: Jackdaw (AM-368, Puget Sound & Dredging, cancelled 6 June 1944) and Jackdaw (AM-402, Defoe Shipbuilding, cancelled 12 August 1945). Hazegray's DANFS transcription carries a transcriber's note: 'Jackdaw was struck from the Navy List 1 January 1960 and transferred to Mexico as Jurua January 1963' - 'Mexico' is a transcription error (all other sources, including the Brazilian NGB record, give Brazil; the January 1963 date is her Brazilian Navy incorporation date).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-1960 (entry coverage)
- Population
- USN crew at naming (ship in reserve, San Diego, February 1947)
- Limitations
- DANFS coverage is minimal (two sentences) and contains no asbestos or material content. Live NHHC DANFS page returned 404 on 2026-10-04; the Wayback capture (30 Sep 2022) of the NHHC page is cited. The hazegray transcriber's note errs on the recipient country (Mexico); Brazil is corroborated by NavSource, shipbuildinghistory, and the Brazilian NGB record - carried as a documented conflict/correction, not silently resolved.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-02
-
[4]National Archives, Special List #44, by Ship Numbers - 'List of Logbooks of US Navy Ships, Stations, and Miscellaneous Units' (NARA PDF) [other_primary]
- Locator
- sl-44-ship-number.pdf, PDF page 120, line 'YMS-373 4/29/1944 6/29/1945'; digitized-logs absence checked at archives.gov/research/military/logbooks/navy-online
- Finding type
- historical_record
- Finding
- NARA Special List 44 inventories US Navy deck logs for YMS-373 covering 29 April 1944 - 29 June 1945 (PDF page 120). The coverage window begins on her commissioning date and spans her entire documented combat period, including the August-September 1944 Southern France sweep period. The logs are paper holdings at the National Archives; YMS-373/Jackdaw does not appear on NARA's 'Navy Deck Logs Available in the National Archives Catalog' digitized-logs page, so these logs are not digitized publicly.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-04-29 to 1945-06-29 (inventory coverage)
- Population
- USN crew, April 1944 - June 1945 (window covered by extant logs)
- Limitations
- Inventory coverage, not log content: SL44 records that logs exist for these dates; it does not establish what the logs contain, and the 29 June 1945 end date is the extent of the accessioned inventory - postwar logs (1945-1960) and the earlier accession's continuation are not ruled out. Commissioning/decommissioning dates are not asserted by this inventory. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-03
-
[5]World War II battle-stars listing for US Navy vessels YMS-362 to YMS-481 (vendor reproduction of the official SECNAV/OPNAV WWII battle-star list), corroborated by the Brazilian Navy NGB history of Juruá (M-13) [other_primary]
- Locator
- officialmilitaryribbons.com USS YMS-362 to YMS-481 battle-star table, entry 'YMS 373: 20 Aug 44 - 23 Sep 44, E7, Invasion of Southern France'; NGB Juruá M-13 page historical section
- Finding type
- vessel_history
- Finding
- YMS-373 is credited with one WWII battle star: campaign E7, 'Invasion of Southern France,' 20 August - 23 September 1944 (Operation Dragoon). The Brazilian NGB record independently corroborates combat service in France: 'during the 2nd World War [she] participated in the invasion of France, receiving the Combat Medal with one star.' Her presence in the Gulf of Mexico 16 May 1944 (shakedown-era NARA photo) and the deck-log window through June 1945 bracket a transit to the Mediterranean within weeks of her 29 April 1944 commissioning.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944
- Population
- USN crew during Operation Dragoon sweep operations, August-September 1944
- Limitations
- The cited list is a commercial-vendor reproduction of the official Navy battle-star compilation, not the primary document itself - verification_status is partial accordingly, though the NGB Brazilian record independently corroborates one battle star for the invasion of France. Establishes campaign participation, not any detail of operations; the ship's own deck logs (NARA, undigitized) are the underlying primary source.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-04
-
[6]NGB - Navios de Guerra Brasileiros, 'Navio Varredor/Navio Auxiliar Juruá - M 13/U 19' (Brazilian Navy ship-history record compiled from Marinha do Brasil ministerial notices and NOMAR journals) [other_primary]
- Locator
- naval.com.br NGB Juruá M-13/U-19 page, 'Datas' and 'Histórico' sections
- Finding type
- vessel_history
- Finding
- Brazilian-service record for ex-Jackdaw: built at Weaver Shipyards, Orange, TX; launched 29 January 1944; incorporated into the USN 29 April 1944; struck from the USN list 1 January 1960; transferred to Brazil 18 January 1960 and formally incorporated into the Marinha do Brasil 18 January 1963 as Navio Varredor Juruá (M-13), fourth Brazilian ship of the name. Arrived Rio de Janeiro 6 August 1963 after an 8,494-mile, 40-day passage; served with the 1st Minesweeper Division, Força de Minagem e Varredura (DRAGÃO and UNITAS exercises, Guanabara Bay patrols, hydrographic escort, salvage duty, merchant-marine officer training); moved with the force to Base Naval de Aratu, Salvador, 7 March 1971; reclassified Navio Auxiliar U-19 on 26 July 1974 (Grupamento Naval do Leste, 2nd Naval District); decommissioned 25 May 1982 at Aratu in a joint ceremony with NAux Javari under Aviso of 17 February 1982. Brazilian-era fit: SPS-10 surface-search radar, AN/QUS-1B minehunting sonar, two twin 20mm Oerlikon Mk 12 mounts; crew 33 (4 officers, 29 enlisted).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1960-1982
- Population
- Brazilian Navy crew and dockyard trades, 1960/1963-1982
- Limitations
- Resolves two circulating errors: NavSource's 'struck from the Brazilian Navy list in 1969' is contradicted by NGB's documented 25 May 1982 decommissioning ceremony, and the hazegray DANFS transcriber's 'Mexico' is an error - NGB documents Brazil. NGB is a serious but secondary Brazilian compilation citing ministerial notices (Avisos) and SDGM journals rather than the notices themselves. The 1960 transfer / 1963 incorporation gap (three years between US transfer and MB incorporation) is explained by the record as written; final disposal after 1982 is not documented. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-05
-
[7]ShipbuildingHistory (Tim Colton), 'Weaver Shipyards, Orange TX' yard history and build table; companion US Navy YMS production table at shipbuildinghistory.njscuba.net/us-navy-small/ym/ [other_primary]
- Locator
- shipbuildinghistory.com Weaver yard page, build table row 'YMS 373'
- Finding type
- vessel_history
- Finding
- Builder documentation: Weaver Shipyards, Orange, TX (Joseph Weaver and Son, est. 1897; renamed Weaver Shipyards on L. E. Weaver's death in 1941) was a small repair yard that took 1941-42 Navy contracts for wooden minesweepers and subchasers - the yard's WWII production was wood-hulled minecraft. Its build table lists YMS 373, US Navy, minesweeper, 278 GT, delivered 28 April 1944, 'reclassified 1947 as Jackdaw (AMS 21), to Brazil 1960 as Jurua (M 13).' Confirms wooden-hull construction of this class at this yard.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1944
- Population
- Weaver Shipyards construction trades, 1942-44
- Limitations
- Secondary compilation (Colton's ShipbuildingHistory) - the yard table corroborates NavSource on builder and delivery; GT tonnage (278) is a register-ton figure differing from NavSource's 270 t. displacement. 'Wood minesweeper' construction is class documentation, not a hull material survey. No asbestos content; whether Weaver's yard itself appears in shipyards.json: it does not - logged in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-06
-
[8]Era inference built on: NavSource YMS-1-class spec block (wooden-hulled class; two GM 8-268A diesels, two shafts - no steam plant); shipbuildinghistory Weaver yard record (wood minesweeper contracts); class design data (YMS-135 subclass, single stack); GAO HRD-80-2 Navy asbestos-era documentation [other_primary]
- Locator
- NavSource 11/19373.htm specifications block; shipbuildinghistory Weaver page (wood minesweeper contracts); YMS-1 class design data
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel motor minesweeper built 1942-44 for WWII service sits inside the Navy's documented asbestos-use era, but this hull type had a far smaller asbestos footprint than steam vessels: no boilers, no turbines, no steam piping to lag. Era-standard applications aboard a 1944 motor minesweeper were diesel-exhaust lagging, machinery and piping gaskets, valve packing, electrical insulation, and possible asbestos-content sheet/panel material (e.g., engine-room fireproofing and switchboard backing) - all inside a confined 136-foot wood hull where the 32-man crew lived and worked in close proximity to the machinery space.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1942-1982
- Population
- Weaver construction trades (1942-44); USN crew (1944-60); Brazilian Navy crew and yard trades (1960/63-82)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for YMS-373/Jackdaw. Names era-standard applications, not confirmed installed materials; no quantity. The wooden hull and diesel plant make the exposure pathway materially narrower than for steam vessels - the inference should not be inflated to a steam-ship-level finding.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-07
-
[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 USN construction (1942-44) and service era (1944-60), and relevant to her Brazilian-era service (1960/63-82) aboard an unaltered WWII-era hull.
- 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, standing defect) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-08
-
[10]Batch-9007 search ledger (this record): NavSource vessel page; NHHC DANFS (Wayback); hazegray DANFS transcription; NARA Special List 44 ship-number PDF (verified p.120); NARA digitized-logs index; NGB Brazilian ship record; shipbuildinghistory Weaver/YMS tables; uboat.net warship card; WWII battle-star list reproduction; CourtListener (see ledger); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-373-01 through sl-uss-yms-373-12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, crew exposure study, or verified litigation naming USS YMS-373 / Jackdaw (AMS-21/MSC(O)-21) / Juruá (M-13/U-19) was found in the public sources searched (see search_ledger). Secondary web sweeps surfaced no qualifying asbestos case; the only 'asbestos aboard' material surfaced for this hull type is vendor/mesothelioma-marketing list content, 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 - a 1944 diesel minesweeper's era-consistent materials remain an open question absent the hull's deck logs, Weaver work packages, or Brazilian-era maintenance records. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-373-09