Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
-
[1]research packet 376-packet.md (7 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-ix-530-ix530-pkt-376-packet-md
-
[2]Naval Vessel Register (NAVSEA) ship detail, NO NAME (IX 530), ex-YFN 268, YFND 5 - via Wayback Machine captures 2016-11-06 through 2020-11-01; corroborated by NVR inactive-hulls list capture 2016-09-27 [other_primary]
- Locator
- NVR ship detail page (Wayback capture 2020-11-01); NVR QUICKFIND inactive-ships list (Wayback capture 2016-09-27)
- Finding type
- vessel_history
- Finding
- Official NAVSEA register entry: Unclassified Miscellaneous service craft, UIC 22742, builder Associated Shipbuilders; awarded 1940-09-01, keel laid 1940-11-10, launched 1940-12-01, delivered 1941-02-01; steel hull and superstructure; 110 ft overall/waterline length, 35 ft extreme beam, 7 ft draft; 170 tons light / 590 tons full displacement, 420 tons deadweight; no propulsion data (non-self-propelled); no accommodations listed; stricken 2008-05-06; disposed 2009-07-14, sold by Defense Reutilization and Marketing Service (DRMS) for reuse/conversion.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1940-2009
- Limitations
- Identity and milestone record only - the NVR contains no asbestos, materials, insulation, or crew information. Vessel page no longer serves on the live register (disposed 2009); data taken from Wayback captures. Does not establish or exclude asbestos aboard.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-01
-
[3]NavSource Service Ship Photo Archive, YF/YFN Covered Lighter index (YF-268 entry); YFND index (14/56idx.htm); IX photo index (09/46/46idx.htm) [other_primary]
- Locator
- YF-268 index entry, navsource.net/archives/14/25idx.htm; YFND-5 entry, 14/56idx.htm; IX-530 entry, 09/46/46idx.htm
- Finding type
- vessel_history
- Finding
- Volunteer-maintained photo-archive index records the reclassification chain: built by 'Associated Shipbuilding, HI.' (Harbor Island); delivered to the US Navy February 1941; reclassified Large Covered Lighter YFN-268 (date unknown); reclassified Dry Dock Companion Craft YFND-5 (date unknown); reclassified Miscellaneous Unclassified IX-530 on 2000-09-06; last notation 'Active, in service at Southwest Regional Maintenance Center, San Diego, CA'; specs 160 t light / 590 t full, 110 ft x 35 ft x 8 ft.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1941-2008 (NavSource last update)
- Limitations
- NavSource is a secondary, volunteer-maintained archive - cited as an archival lead, not an official record. The YFN-268/YFND-5 reclassification dates are given as unknown; the IX-530 reclassification date (2000-09-06) and SWRMC assignment have no official corroboration located. The 'in service' notation is stale (NVR records stricken 2008). No dedicated photo/history page exists for this hull - index entries only.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-02
-
[4]Hazegray 'World Navies Today: US Navy Minor Auxiliaries & Yard Craft' (compiled by Andrew Toppan; page revised 2003-03-10, version 2.18), Non-Self-Propelled Yard/Service Craft section [other_primary]
- Locator
- Non-Self-Propelled Yard/Service Craft table (Wayback capture 2022-09-10)
- Finding type
- vessel_history
- Finding
- Lists 'IX 530 (none) - Dive Support Barge - Southwest Regional Maintenance Center,' describing the craft's IX-era role: a non-self-propelled barge employed as a dive-support platform at SWRMC, San Diego, during the period of its IX designation (assigned 2000; stricken 2008).
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- ca. 2000-2008 (IX designation period)
- Limitations
- Enthusiast-compiled secondary reference - the 'Dive Support Barge' role label and SWRMC assignment are not confirmed by an official document; consistent with NavSource's SWRMC notation. Page predates the 2008 striking.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-03
-
[5]Puget Sound Bridge & Dredging Co. v. Department of Labor & Industries, 26 Wn.2d 550, 174 P.2d 957 (Wash. 1946) [court_record]
- Locator
- Opinion text, 26 Wn.2d 550 (decided 1946-11-29, docket 29986)
- Finding type
- vessel_history
- Finding
- Washington Supreme Court opinion judicially describes the builder named in the NVR: on 1940-09-19 Puget Sound Bridge & Dredging Co. and Lake Union Dry Dock & Machine Works formed the 'Shipbuilding Joint Venture' named Associated Shipbuilders, operating a shipbuilding plant on Harbor Island, Seattle (West Waterway); under the agreement hulls were constructed at the Puget Sound plant on Harbor Island and taken to the Lake Union plant for installation of equipment.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- 1940-1946
- Population
- Wartime Associated Shipbuilders workforce (context only)
- Limitations
- Court record establishing the corporate identity and wartime operation of the builder; it does not name this hull or any vessel. Application to YF-268 specifically rests on the JV's standard arrangement (hulls at Harbor Island, outfitting at Lake Union) and secondary yard tables - consistent but not hull-proven. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-04
-
[6]Corn, Jacqueline Karnell, and Jennifer Starr, 'Historical perspective on asbestos: Policies and protective measures in World War II shipbuilding,' American Journal of Industrial Medicine 11(3):359-373 (1987) [other_primary]
- Locator
- Abstract and article, AJIM 11(3):359-373
- Finding type
- asbestos_application
- Finding
- Peer-reviewed historical study documents that asbestos was used extensively as a fireproofing and insulating material in U.S. shipbuilding of the WWII era - the same industrial environment in which this hull was built (keel 1940-11-10, delivered 1941-02-01, during the pre-war naval expansion immediately preceding the wartime emergency program).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1940s era documented; article 1987
- Population
- WWII-era shipyard workers and ship crews (class context)
- Limitations
- Program/era-level scholarship; does not name this vessel, this craft type, or this yard's practices for this contract, and does not establish that asbestos was or remains aboard this hull, nor quantity, location, condition, exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-05
-
[7]NVR physical characteristics (non-self-propelled steel hull; no propulsion or accommodations entries) + NavSource type heading 'Covered Lighter (Non Self-propelled)' / 'Dry Dock Companion Craft (Non Self-propelled)' [other_primary]
- Locator
- NVR ship detail physical-characteristics block; NavSource 14/25idx.htm and 14/56idx.htm type headings
- Finding type
- asbestos_application
- Finding
- As a steel-hulled naval service craft built 1940-41, period-typical asbestos-containing materials - gaskets, packing, deck covering, asbestos-cement panels, insulation board, wiring insulation - may have been fitted where systems required them. Unlike powered vessels, this non-self-propelled lighter carried no boilers, steam plant, or propulsion machinery, so the thermal-insulation applications documented as the principal asbestos concentration aboard combatant vessels are structurally absent from this craft type.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1940-41 construction; service to 2008
- Population
- Shipyard construction trades (Seattle, 1940-41); later maintenance/dive-support personnel (era inference)
- Limitations
- Era/craft-type inference, not a hull record - no document confirms any asbestos product aboard this hull, and the absence of a propulsion plant bounds but does not eliminate possible asbestos applications (deck fittings, pumps, dive-era equipment after 2000 unassessed). Does not establish quantity, condition, exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-06
-
[8]Batch-4837 search ledger (this record): Naval Vessel Register; NavSource indexes; hazegray; NHHC/DANFS site search; NARA catalog; MARAD ShipHistory; CourtListener opinion/docket searches; Washington Supreme Court opinion; shipbuildinghistory yard tables [other_primary]
- Locator
- search_ledger rows sl-uss-ix-530-ix530-01 through sl-uss-ix-530-ix530-11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum file, or docketed case naming YF-268 / YFN-268 / YFND-5 / IX-530 was found in the sources searched (see search_ledger). CourtListener opinion searches on 'IX-530' and 'IX 530' returned a single name-collision hit (an Illinois education-labor opinion) and no qualifying asbestos litigation.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2026-09-29
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - era-typical materials are plausible in a 1940-41 hull, and post-2009 private reuse could have generated non-public survey or abatement records. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-530-ix530-07