Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
-
[1]research packet 1099-packet.md (2 sources cited) [nhhc_danfs]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-dekaury-yt178-pkt-1099-packet-md
-
[2]DANFS, Dekaury (YT-178) - NHHC live page verified 2026-10-05 (entry written while still in service: 'is so employed today') [nhhc_danfs]
- Locator
- DANFS Dekaury (YT-178) entry, full text
- Finding type
- vessel_history
- Finding
- Documented for this hull: 'Dekaury (YT-178) was built by Gibbs Gas Engine Co., Jacksonville, Fla., and placed in service early in 1943 in the 1st Naval District. She was reclassified YTB-178 on 15 May 1944 and in 1946 was transferred to the 12th Naval District to perform towing duties until September 1947 when she was placed in reserve. Dekaury returned to active service at Mare Island Naval Shipyard in September 1950 and is so employed today.' Namesake: 'Two noble chiefs of the Winnebago tribe were so named.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1943-1960s (entry coverage)
- Population
- Gibbs construction trades (1942-43); crew (1943-forward)
- Limitations
- Ship-specific official history only; no asbestos, material, or machinery content. DANFS entry predates her 1962 YTM reclassification and 1985 striking - post-1960s milestones come from other rows. Entry carries no specification block (complement, dimensions unverified by DANFS).
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-01
-
[3]NavSource Online: Service Ship Photo Archive, Dekaury (YTM-178) ex YTB-178 ex YT-178 - full milestone timeline, specifications, post-Navy disposition and museum status [other_primary]
- Locator
- NavSource 14/08178 header block, specifications block, disposition lines, photo captions
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 30 April 1942 at Gibbs Gas Engine Co., Jacksonville FL; launched, date unknown; placed in service as Dekaury (YT-178) 1943; allocated to First Naval District at NOB Newport 1943-45; reclassified District Harbor Tug, Large YTB-178, 15 May 1944; transited to West Coast August-September 1945; reallocated to Twelfth Naval District 1946; placed out of service September 1947; reactivated and placed in service at Mare Island Naval Shipyard, Vallejo CA, September 1950; reclassified District Harbor Tug, Medium YTM-178, February 1962; struck from the Naval Register 30 September 1985; transferred to the Stockton CA Fire Department (date unknown); registered as Dekaury (ON 907073) 1986; sold private; part of the 'Naval Ships Restoration Foundation' non-profit; berthed as museum in Richmond CA. Spec block: 260 tons (lt), 101' length, 26' beam, 12 knots, complement 12; propulsion 'As Built: Diesel, single propeller, 1,000shp; Re-engined: twin Cleveland 278's 650HP each Diesel electric engines, single propeller, 1,050shp'. Awards: American Campaign Medal, WWII Victory Medal, National Defense Service Medal; call sign NUBA.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-2025
- Population
- Gibbs construction trades (1942-43); crew (1943-47, 1950-85); Stockton FD fireboat crews (post-1985); restoration volunteers (2006-2025)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track DANFS/NVR where comparable (15 May 1944 reclassification matches DANFS). Contains no asbestos content. USCG official number printed 'ON 907073' conflicts with shipbuildinghistory's '903073' (see gaps). Re-engining date not stated.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-02
-
[4]Naval Historical Center Online Library photo page, Dekaury (YT-178, later YTB-178 and YTM-178), 1943-1985 (via HyperWar/ibiblio transcription) + NavSource-captioned US Navy photography placing the tug at Mare Island Naval Shipyard 1953-1969 [other_primary]
- Locator
- HyperWar USN Ships Dekaury page (photo NH 84584); NavSource 14/08178 photo-caption table
- Finding type
- historical_record
- Finding
- The Naval Historical Center's Dekaury page summarizes: 'a 260-ton harbor tug built at Jacksonville, Florida ... placed in service in early 1943 ... transferred to the 12th Naval District, in the San Francisco Bay area. Laid up in 1947-50, Dekaury was returned to service at the Mare Island Naval Shipyard in September 1950 and remained active into the 1980s. Reclassified YTM-178 in the 1960s, she was stricken from the Naval Vessel Register in September 1985.' US Navy photographs caption her performing shipyard-tug duties at Mare Island: assisting USS Rochester (CA-124) departing post-overhaul, 20 September 1953 (photo NH 84584, Naval Historical Center collections); assisting USS Robert E. Lee (SSBN-601) mooring, 23 February 1965; PCU Gurnard (SSN-662) in the Mare Island channel, 20 May 1967; escorting just-launched PCU Guitarro (SSN-665) to dry dock, 27 July 1968 and alongside her sail 15-18 May 1969; and assisting USS John C. Calhoun (SSBN-630) arriving for C-3 Poseidon conversion, 2 August 1969.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1953-1969 (documented window); service era 1950-1985
- Population
- Dekaury crew during Mare Island ship-assist duties (1953-1969 documented window); personnel aboard assisted vessels
- Limitations
- Documents 35 years of Mare Island ship-assist duty including nuclear-submarine work - a physical-presence and assignment record, not a work, survey, or materials record. Photo captions transcribed via NavSource (Naval Historical Center, Vallejo Naval and Historical Museum, and Mare Island Naval Shipyard photo credits). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-03
-
[5]U.S. Naval Institute Proceedings, 'Ships' Status Changes' (May 1986 issue) - official Navy status-change listing [reputable_press]
- Locator
- USNI Proceedings May 1986, Ships' Status Changes table (30 Sep. 85 entries)
- Finding type
- historical_record
- Finding
- The Navy's status-change listing records '30 Sep. 85 | Dekaury | To be disposed of via sale.' - a contemporaneous record of the 30 September 1985 striking/disposition that NavSource reports from the Naval Register.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1985
- Limitations
- Confirms the strike/disposition date and intended disposal route ('via sale'); NavSource separately records transfer to the Stockton CA Fire Department - whether the FD acquired her by nominal sale or donation is not resolved by this source. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-04
-
[6]Shipbuilding History (Tim Colton), Gibbs Gas Engine yard build table + wartime yard-tug index yt2.htm - builder's production context and post-Navy documentation number [other_primary]
- Locator
- shipbuildinghistory.com Gibbs yard table, 1943 tug rows; smallships/yt2.htm wartime YT index
- Finding type
- historical_record
- Finding
- The Gibbs yard table lists 'Dekaury (YT 178) | US Navy | Tug | 260d | 116 | 1943 | To Stockton FD 1985, now museum' with USCG documentation number 903073, in a consecutive production group of five 260-ton tugs: Black Fox (YT 177), Dekaury (YT 178), Lone Wolf (YT 179), Madokawando (YT 180), Mazepeta (YT 181) - all US Navy, all 1943. The wartime YT/YTB/YTM index lists the same row and records the design family's reclassification pattern (YTB >800 hp; YTM >400<800 hp).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1943; table current to 2011
- Population
- Gibbs Gas Engine construction trades, Jacksonville FL (1942-43)
- Limitations
- Reputable secondary reference (Colton's Shipbuilding History), not a primary registry; USCG number 903073 conflicts with NavSource's ON 907073 - unresolved (see gaps). '116' column figure conflicts with NavSource/HMF 101' LOA - carried as spec conflict in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-05
-
[7]Era inference built on: DANFS/NavSource identification as a 260-ton diesel district harbor tug built 1942-43; NavSource specification block (diesel / diesel-electric, no steam plant); GAO HRD-80-2 (Navy asbestos-use era, ev-07); NavSource sister-page class labeling (Black Fox YT-177, Lone Wolf YT-179, Madokawando YT-180, Mazapeta YT-181 all labeled 'Woban Class District Harbor Tug', all Gibbs-built 1943) [other_primary]
- Locator
- NavSource 14/08178 specifications; NavSource sister pages 14/08177, 14/08179, 14/08180, 14/08181 (class labels); GAO HRD-80-2 (ev-07)
- Finding type
- asbestos_application
- Finding
- A 260-ton diesel-electric district harbor tug built 1942-43 at Gibbs Gas Engine sits inside the Navy's documented asbestos-use era. Era-standard applications aboard a diesel-electric harbor tug of this type and period were thermal insulation and lagging on the diesel exhaust system and engine-room piping, flange and valve gaskets, machinery packing, and electrical insulation associated with the open DC switchboard plant. As a diesel/diesel-electric craft she carried no boilers or steam plant - the boiler/turbine lagging pathway of steam vessels does not apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1942-present
- Population
- Gibbs construction trades (1942-43); crew and engineering watchstanders (1943-47, 1950-85); Stockton FD crews (post-1985); restoration trades/volunteers disturbing original-era material (2006-2025)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or restoration disclosure located for YT/YTB/YTM-178. Names era-standard applications, not confirmed installed materials. No quantity, no manufacturer attribution. Whether original-era materials survived service, the post-1985 fireboat period, or the 2006-2025 restoration is undocumented.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-06
-
[8]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 Navy service era (construction 1942-43 through striking 1985).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1979
- Population
- Navy shipyard workers and ship crews; 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-dekaury-yt178-07
-
[9]Collins v. Plant Insulation Co., 185 Cal. App. 4th 260 (2010), No. A124268 (Cal. App. 1st Dist., filed June 3, 2010, Banke, J.) [court_record]
- Locator
- 185 Cal. App. 4th 260, A124268 (Justia opinion page with official slip-opinion PDF; casetext.com mirror from the yard dataset is dead - HTTP 410)
- Finding type
- litigation_documented
- Finding
- Yard-level litigation documentation at this tug's 35-year duty station: Ulysses Collins welded at Hunters Point Naval Shipyard (1960-1973) and Mare Island Naval Shipyard (1976-1994) and died of mesothelioma; a jury found Plant Insulation Co. negligent and strictly liable. On appeal the court reversed only the exclusion of the U.S. Navy from the Proposition 51 fault-apportionment list and remanded for retrial on apportionment - a ruling on allocation/sovereign immunity, not on the underlying exposure findings.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 2010 (opinion); exposure 1976-1994
- Population
- Mare Island Naval Shipyard trades (1976-1994 exposure window for this decedent)
- Limitations
- Mare Island yard-worker litigation, not a vessel record - the tug and her crew are not parties or subjects of the case. Disposition described at appellate stage exactly: merits finding for plaintiffs below, reversal limited to apportionment of fault to the Navy, remanded; establishes nothing about materials aboard YTM-178. Reporter citation 185 Cal. App. 4th 260.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-08
-
[10]Polakoff PL, Horn BR, Scherer OR, 'Prevalence of radiographic abnormalities among Northern California shipyard workers,' Annals of the New York Academy of Sciences 330:333-339 (1979), PMID 294185 - 'Supported by the Metal Trades Council, Mare Island Naval Shipyard, California, and the Metal Trades Department, AFL-CIO' [other_primary]
- Locator
- Ann. N.Y. Acad. Sci. 330:333-339 (Dec 1979), DOI 10.1111/j.1749-6632.1979.tb18736.x, PMID 294185; support footnote on Wiley page
- Finding type
- historical_record
- Finding
- A peer-reviewed radiographic survey of Northern California shipyard workers conducted with the support of the Metal Trades Council at Mare Island Naval Shipyard - evidence that asbestos-related radiographic screening of Bay Area yard workers, including the Mare Island workforce, was underway and being published by 1979.
- Verification
- partial
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1979 (publication)
- Population
- Northern California shipyard workers incl. Mare Island metal-trades workforce (supporting union sponsor)
- Limitations
- Yard/workforce-level health survey, not a vessel record - the tug is not named and harbor-tug crews are not identified as a study population. Abstract/full text paywalled (PMID 294185 record carries no abstract); cohort size, trade composition, and abnormality rates are not verifiable from accessible text. Cited for the documented fact of the survey and its Mare Island Metal Trades Council support only.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-09
-
[11]Historic Maritime Foundation, USS Dekaury project page - current owner/museum; restoration scope and 2026 relocation plan [museum_official]
- Locator
- historicmaritimefoundation.org Dekaury project page (History, 1943, 2006-2025, April 2026 sections); NavSource 14/08178 restoration captions (James Adams, Dekaury Restoration Corp.)
- Finding type
- historical_record
- Finding
- The current custodian records: an approximately 19-year restoration to 1945 configuration (near completion); post-Navy history as Stockton fireboat, a scrapyard-survival episode, and several private owners; donation to Historic Maritime Foundation as flagship; and a planned April 2026 transit from Alameda CA to Seattle WA, haul-out, repairs, and repainting to her WWII scheme. NavSource's restoration captions add that the diesel-electric plant with open DC switchboard is 'fully restored and operational' and that Dekaury 'is one of the only diesel electric YTMs that has not been modified.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2006-2026
- Population
- Restoration trades and volunteers (2006-2025); museum visitors/staff (present)
- Limitations
- Museum source is reliable for custody/restoration status but its history text contains errors: 'launched in 1941' contradicts the documented 30 April 1942 laying down, and '1st naval district in New York city' contradicts NOB Newport (1st Naval District, New England). Carried dates come from DANFS/NavSource/USNI; the museum text's conflicting claims are noted in gaps, not adopted. No asbestos or hazmat disclosure in the restoration record.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-10
-
[12]Batch-9315 search ledger (this record): NHHC DANFS live page; NavSource 14/08178 + sister pages; HyperWar/NHC photo page; USNI Proceedings status list; shipbuildinghistory Gibbs + YT indexes; HMF/museumships; GAO product page; Collins opinion; Polakoff/PMID 294185; CourtListener (4 base + 2 asbestos-qualified variants - all classified, none qualifying); NARA/USCG leads [other_primary]
- Locator
- search_ledger rows sl-uss-dekaury-yt178-01 through -18
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, insulation material list, abatement contract, hazmat disclosure from the 19-year restoration, or qualifying litigation naming Dekaury (YT/YTB/YTM-178) was found in the public sources searched (see search_ledger for repository-by-repository results, including the CourtListener litigation disposition).
- 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 - she is a 1943-built hull that retains original-era configuration after a 19-year restoration, itself consistent with either retained or removed era materials; no documentation either way was located. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-dekaury-yt178-11