Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 1050-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-312-yms312-pkt-1050-packet-md
-
[2]DANFS, 'Grackle II (YMS-312)', NHHC live page (verified live 2026-10-04; published 2015-07-13) [nhhc_danfs]
- Locator
- DANFS service narrative and spec block, Grackle II (YMS-312) entry
- Finding type
- vessel_history
- Finding
- DANFS (Grackle II entry) documents this hull: launched 9 November 1943 by Henry B. Nevins, Inc., City Island, N.Y.; sponsored by Mrs. W. G. Kroepke; commissioned as YMS-312, 6 December 1943, Lt.(j.g.) Ray G. Huling in command; redesignated Grackle (AMS-13) 18 February 1947. Service: Key West 4 February 1944 after shakedown; sound training; Curaçao 17 February 1944; escort, minesweeping and patrol duties in Caribbean waters until getting underway 1 September 1944 for San Pedro, Calif., and Hawaii (printed DANFS text reads 1944; the live NHHC page renders '1945' - see ev-09). Pacific duty terminated 9 April 1946; steamed east through the Panama Canal for overhaul at Charleston, S.C.; arrived Norfolk 15 May for Chesapeake Bay operations until November 1947 when she shifted base to Charleston; tours for Naval Schools Mine Warfare, Yorktown, Va., and the U.S. Naval Mine Countermeasures Station, Panama City, Fla.; minesweeping off Massachusetts near Martha's Vineyard until 27 June 1951, then reported to the Mine Warfare School at Yorktown as a school ship; sailed 1 March 1952 for Caribbean Mine Force combined fleet maneuvers off Puerto Rico, Cuba, and the Virgin Islands, returning to Yorktown late March; later years alternated school-ship duty, amphibious exercises off North Carolina, and mine countermeasures operations on the Eastern seaboard. Redesignated coastal minesweeper (MSC(O)-13) February 1955; placed in service in reserve 16 September 1957; stricken from the Navy List 1 March 1963; after conversion to coastal minehunter, transferred to the Government of Brazil 19 April 1963 under the Military Assistance Program; served the Brazilian Navy as Jurvena (M-14). Spec block: dp. 270; l. 136'; b. 24'6"; dr. 10'; s. 14 k.; cpl. 32; a. 1 40mm.; cl. YMS-136.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1963
- Population
- Nevins construction trades (1943); YMS-312/Grackle crew (1943-1957); Brazilian crew (1963-?)
- Limitations
- Ship-specific history only; contains no asbestos or material-content statement. The entry predates the 11 October 1957 decommissioning (per NavSource) and ends with Brazilian service. The live NHHC page carries visible OCR artifacts ('1 September 1945' for the printed '1944', 'TT.S.' for 'U.S.', 'York-town') - see ev-09; the 1944 reading is carried, confirmed by the printed-text transcription at losthistory.net/hazegray/danfs/mine/yms312.htm.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-01
-
[3]NavSource Online, Mine Warfare Vessel Photo Archive, Grackle (MSC(O) 13) / ex-AMS-13 / ex-YMS-312 (verified live 2026-10-04) [other_primary]
- Locator
- YMS-312 page: construction/disposition block, specifications block, commanding-officer table, photo captions
- Finding type
- vessel_history
- Finding
- NavSource's live YMS-312 page (Grackle (MSC(O) 13) / ex-Grackle (AMS 13) / ex-YMS-312) documents: laid down 7 June 1943 by Henry B. Nevins Inc., City Island, NY; launched 9 November 1943; completed 4 December 1943; commissioned USS YMS-312, 6 December 1943; detached from the Caribbean Sea Frontier 10 November 1944; named Grackle and reclassified Motor Minesweeper AMS-13, 18 February 1947; reclassified Coastal Minesweeper (Old) MSC(O)-13, 7 February 1955; placed in service, in reserve 16 September 1957; decommissioned 11 October 1957 at Philadelphia, PA; struck from the Naval Register 1 March 1963; transferred to the Government of Brazil 19 April 1963 under the Military Assistance Program and renamed Jurvena (M 14); fate unknown. Specifications: displacement 270 t.; length 136'; beam 24'6"; draft 8'; speed 13 kts.; complement 50; armament one 3"/50 dual-purpose mount, two 20mm mounts, one depth-charge projector; propulsion two 880-bhp General Motors 8-268A diesel engines, Snow and Knobstedt single-reduction gear, two shafts. Call sign November-Papa-Papa-Foxtrot. Commanding officers listed: LTJG Ray G. Huling (6 Dec 1943); LTJG Lyman E. Gregory USNR (1944); LT Stanley Edward Sweeder (1950-Dec 1951); LT Harry R. Lawson USNR (Dec 1951-Dec 1952); LTJG Robert V. Vaughn USNR (Dec 1952-Dec 1954); LTJG Gordan Van Hook (Dec 1954-Aug 1957). Page photography: launch image courtesy City Island Nautical Museum; NHHC photo NH 89227 captioned c. December 1958, New Bedford, Massachusetts; Charleston Minecraft Base Pier Baker photo.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1963
- Population
- Nevins construction trades (1943); crew (1943-1957); Philadelphia inactivation personnel (1957); Brazilian crew (1963-?)
- Limitations
- NavSource is a specialist photographic/archive compilation rather than a Navy register or DANFS entry; its milestone dates are consistent with DANFS where the two overlap. Specification conflicts with the DANFS spec block are carried in gaps (complement 50 vs 32; draft 8' vs 10'; speed 13 vs 14 kts; armament 3"/50 + 20mm + DCP vs single 40mm). Contains no asbestos or material-content statement. Laid-down and decommissioning dates rest on NavSource alone.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-02
-
[4]National Archives, Special List 44 deck-log inventory for YMS-312 (NARA ship-numbers PDF + 1978 printed volume via ACPL scan) [other_primary]
- Locator
- PDF page 118 of 137: 'YMS-312 12/6/1943 12/31/1945'; corroborating scan printed page 518 (7 logbooks), http://genealogycenter.net/nara/images/narasl44/550.jpg
- Finding type
- historical_record
- Finding
- The National Archives Special List 44 ('List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947') inventories deck logs for YMS-312 covering 6 December 1943 through 31 December 1945. In the NARA 'Special List #44, by Ship Numbers' PDF the entry 'YMS-312 12/6/1943 12/31/1945' appears on PDF page 118 of 137 (verified by direct page extraction). The 1978 printed volume independently shows 'YMS-312 | Dec. 6, 1943-Dec. 31, 1945 | 7 logbooks' on printed page 518 (Allen County Public Library scan, T-Y signal-designation section). The entry is an archival inventory of cataloged log coverage; the start date coincides with the commissioning date but the dates are log coverage, not asserted commissioning or decommissioning dates.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-12-06 to 1945-12-31
- Population
- YMS-312 crew and operational activity during the indexed log window (commissioning through end-1945)
- Limitations
- This is a finding aid, not the deck-log text. The logs themselves were not retrieved or read; RG 24 logs of this era are not publicly digitized. The index entry contains no asbestos, insulation, exposure, or individual-service finding.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-03
-
[5]Era inference built on: DANFS spec block (YMS-136 class, 270t, diesel-era minecraft); NavSource specifications (2 x GM 8-268A diesels, 2 shafts); YMS-1-class wooden-hull class characteristic (NavSource class pages; Herreshoff construction record for sister YMS-18 lists 'Construction: Wood', 'Nevins Design'); GAO HRD-80-2 Navy-wide asbestos-era documentation [other_primary]
- Locator
- DANFS spec block; NavSource 11/19312 specifications; NavSource class pages 11/19xxx; herreshoff.info YMS-18 construction record
- Finding type
- asbestos_application
- Finding
- Era inference for this hull's material context: a 136-foot, 270-ton wooden-hulled auxiliary motor minesweeper with diesel propulsion (two GM 8-268A engines), built in 1943 at a small yacht/commercial yard during the period when the U.S. Navy used asbestos insulation extensively aboard ships. Era-standard applications aboard a small diesel combatant of this period were thermal insulation in machinery spaces, diesel-exhaust lagging, gaskets, valve packing, and electrical insulation. The diesel plant means no boiler or steam-turbine lagging pathway, and the wooden hull constrains the plausible material footprint relative to steam-driven steel vessels.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1943-1963
- Population
- Nevins construction trades (1943); engine-room and machinery crew (1943-1957); yard/base trades during Charleston overhaul (1946) and inactivation (1957); Brazilian crew (1963-?)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material schedule, or work package located for YMS-312/Grackle. Names era-standard applications, not confirmed installed materials; no quantity; no manufacturer attribution for this hull. Wooden-hull construction is a class characteristic, not a ship-specific material record.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-04
-
[6]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked, HTTP 403 confirmed 2026-10-04; product-page description used)
- Finding type
- gov_survey
- Finding
- GAO's 1979 Navy review 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 (1943) and U.S. service era (1943-1963).
- Verification
- partial
- 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. Does not establish materials aboard this hull, individual exposure, quantity, or present-day presence. Full text not retrieved (gao.gov returns HTTP 403 to automated fetch).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-05
-
[7]National Archives, 'Researching Asbestos aboard US Naval Vessel up through 1961' guided-topic page (verified live 2026-10-04) [other_primary]
- Locator
- Guided-topic page: RG 19/RG 143 record pathways
- Finding type
- regulatory
- Finding
- NARA's official research guide identifies RG 19 Bureau of Ships general/confidential/secret correspondence (1940-1961), ship and class information books, specification files, and engineering drawings as the archival pathways for researching asbestos and related ship-material questions for U.S. Navy vessels through 1961. These are the appropriate next archival leads for YMS-312/Grackle; no such hull-level file was retrieved for this record.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-04
- Study period
- 1941-1961
- Population
- U.S. Navy vessel material records, 1941-1961
- Limitations
- This row documents a research path, not the existence of asbestos aboard YMS-312. The cited guide does not substitute for retrieving hull- or class-level specifications, drawings, or correspondence.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-06
-
[8]Batch-8940 source review: NHHC DANFS (live); NavSource 11/19312; NARA Special List 44 (PDF + printed volume); NARA asbestos research guide; GAO HRD-80-2; CourtListener base sweep (partial); secondary web [other_primary]
- Locator
- search_ledger rows sl-uss-yms-312-yms312-01 through -13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, material schedule, product identification, or adjudicated exposure finding naming USS YMS-312 / Grackle (AMS-13/MSC(O)-13) was found in the public sources searched (see search_ledger). Secondary web sweeps surfaced only law-firm marketing listicles asserting asbestos aboard without primary sourcing - 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 - RG 19/RG 143 hull-level records, the 1943-45 deck logs, and any 1955-63 inactivation/conversion records are undigitized open leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-07
-
[9]CourtListener API v4 via cl-auth-search.py (authenticated; fleet-paced) [court_record]
- Locator
- search_ledger rows sl-uss-yms-312-yms312-08 through -12
- Finding type
- litigation_documented
- Finding
- CourtListener base sweep (authenticated helper, API v4): the hull-number opinion query "YMS-312" returned 61 opinion results - all 20 examined page-1 hits are token collisions (case names and snippets contain no 'YMS-312'; e.g. VA-claims, criminal, and commercial dockets). The hull-number docket query "YMS-312" returned 6,880 docket results - again token collisions, overwhelmingly N.D. Illinois dockets matching on '312'. No qualifying asbestos litigation naming this hull was identified. The exact-name base queries ("Grackle" opinion and docket) remained blocked by the fleet-wide pacing limiter at research time and are logged as an open gap, not a result; the asbestos-qualified variant (justified by both overflows) was likewise held. No anonymous or unpaced request was made.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- Partial result: hull-number searches (opinion + docket) completed and classify as zero qualifying hits amid mass token collision; the exact-name 'Grackle' queries did not run within pacing budget, so the name-level sweep is open, not negative. CourtListener's unquoted tokenization makes 'YMS-312' and '312' collide heavily; raw hit counts are not meaningful. Does not establish or defeat any litigation claim.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-08
-
[10]Cross-check set: NHHC DANFS live page vs printed-text transcription (losthistory.net/hazegray/danfs/mine/yms312.htm); NavSource 11/19312; uboat.net ship/9732; Wikipedia (secondary, not cited as evidence) [other_primary]
- Locator
- NHHC vs transcription: San Pedro departure date; NavSource completion/commissioning lines vs uboat.net infobox; DANFS/NavSource 'Jurvena' vs Wikipedia 'Juruena'
- Finding type
- historical_record
- Finding
- CORRECTIONS: (a) The live NHHC DANFS page renders the San Pedro departure as '1 September 1945'; the printed DANFS text (independent transcription, losthistory.net/hazegray mirror) reads '1 September 1944', consistent with NavSource's 'detached from the Caribbean Sea Frontier 10 November 1944' and the 9 April 1946 Pacific-duty endpoint - the NHHC page carries other visible OCR artifacts ('TT.S. Naval Mine Countermeasures Station', 'York-town'), so 1944 is carried as the printed text. (b) uboat.net lists 'Commissioned 4 December 1943' - a conflation of completion (4 December, per NavSource) with commissioning (6 December, per DANFS and NavSource; deck-log coverage also begins 6 December). (c) The Brazilian name is printed 'Jurvena (M-14)' in DANFS and NavSource but 'Juruena (M14)' in secondary sources (Wikipedia infobox); the Juruena-river spelling is the probable correct Brazilian form but is unverified against a Brazilian source - conflict carried, Jurvena retained in the record per the authoritative sources.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1963
- Limitations
- Corrects circulating date/spelling errors rather than asserting material facts. The Juruena/Jurvena spelling question is unresolved pending a Brazilian Navy or diplomatic source; AM-396 (a Grackle contract terminated 12 August 1945 before completion) did not affect the 'second Grackle' ordinal. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-312-yms312-09