Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
-
[1]research packet 895-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-479-pc479-pkt-895-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-479 page (live URL verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/010479.htm - header timeline, Specifications block, call-sign line, DANFS note
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: 'PC-461 Class Submarine Chaser: Laid down, 15 January 1942 by the Defoe Boat and Motor Works., Bay City, MI; Launched, 10 March 1942; Commissioned USS PC-479, 30 April 1942 at Naval Station Algiers, New Orleans, LA. During World War II, PC-479 was assigned to the Asiatic-Pacific theater of operations and took part in the following operations: Bismark Archipelago; Arawe, New Britain, 15, 30 - 31 December 1943 and Vella LaVella occupation; and the eastern New Guinea operations, Saidor occupation, 5 - 7 and 25 - 27 February 1944. Following World War II, PC-479 was assigned to occupation and China service, 8 September - 29 October 1945. Decommissioned, 13 May 1946 at Naval Base Charleston, SC; Struck from the Navy Register 13 November 1946; Delivered to the Maritime Commission, 5 December 1946 at Port Republic, SC for scrapping.' Specifications: 450 t.; 173' 8"; 23' beam; 10' 10" draft; 20.2 kts; complement 65; one 3"/50 dual-purpose mount, one 40mm, three 20mm, two rocket launchers, four depth-charge projectors, two depth-charge tracks; two 2,880bhp General Motors 16-258S diesel engines (serial nos. 6333 and 6334), Farrel-Birmingham single-reduction gear, two shafts. Call sign Nan-Baker-Love-Fox. Page states 'There is no DANFS History currently available for PC-479.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- Defoe construction trades (1942); U.S. Navy crew, nominal 65 (1942-46); MARCOM-disposal scrapping workers (1946-47)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry; no DANFS exists for this hull. The 'two 2,880bhp' engine listing is ambiguous against the class-standard 1,440 bhp per engine (2,880 bhp total) - carried in gaps. Establishes identity, timeline, and reported specifications, not asbestos content, exposure, causation, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-01
-
[3]uboat.net Allied Warships, USS PC-479 (PC-479) - warship record, commanding-officer list, and transcribed task-group operation records (live URL verified 2026-10-03) [other_primary]
- Locator
- uboat.net/allies/warships/ship/8501.html - data table, Commands section, Notable events (Operation Director 15 Dec 1943; Operation Dexterity 26 Dec 1943)
- Finding type
- vessel_history
- Finding
- Independent warship-register corroboration plus operation-level detail: PC-461 class, built by Defoe Shipbuilding Co. (Bay City, Michigan); ordered 26 December 1940; laid down 15 January 1942; launched 10 March 1942; commissioned 30 April 1942; decommissioned 13 May 1946; stricken 13 November 1946. Seven wartime commanding officers listed, all USNR: J K Davis (30 Apr 1942-13 Jun 1943); Lt. George Herrmann 3rd (13 Jun-14 Aug 1943); Lt.(jg.) William John Aylward (14 Aug-14 Sep 1943); M C White (14 Sep 1943-mid 1944); N J Hartzer (mid 1944-early 1945); R. L. Greenhaler (early-mid 1945); E H Klein (mid-late 1945). Task-group records place this hull, under Lt. M.C. White, in the 15 December 1943 Arawe assault convoy (Operation Director; escort group with USS PC-1122, SC-742, SC-981, YMS-51) and in Task Group 76.3 'Western Assault Group' for the 26 December 1943 Cape Gloucester landings (Operation Dexterity): Task Unit 76.3.2 Small Craft Unit - 12 LCTs and 16 LCMs escorted by PC-479, SC-637, and SC-699 - departed Cape Cretin 1600L/25 December for Green Beach (western area) and returned 0900L/27 December.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- U.S. Navy crew under seven successive USNR commanding officers (1942-45); amphibious-force small-craft crews under escort
- Limitations
- uboat.net is a reputable specialist secondary register transcribing published operation records - corroborative for milestones and operations, not a primary registry; 'notable events' pages note the command list is a work in progress. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-02
-
[4]Shipbuilding History (Tim Colton), 'Sub Chasers Built During WWII (SC, PC, PCE, PCER, PCS)' - PC-479 construction row (archived copy: live page returns HTTP 500 as of 2026-10-03; Wayback capture 2025-07-03) [other_primary]
- Locator
- wayback capture of shipbuildinghistory.com/smallships/pc2.htm - PC-461 series table, PC-479 row
- Finding type
- vessel_history
- Finding
- Independent construction-table corroboration for this hull: 'PC 479 | Defoe SB | Bay City MI | 463 LDT | 173 LOA | 30-Apr-42 delivery | Scrapped 1946' - confirming the builder, location, delivery/commissioning date, and disposal year against NavSource and uboat.net.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- Defoe construction trades (1942); MARCOM-era disposal/scrapping workers (1946-47)
- Limitations
- Shipbuilding database (Colton) - a reputable specialist secondary register; delivery column conventionally tracks commissioning for these craft. Live njscuba.net mirror and shipbuildinghistory.com both fail as of 2026-10-03; the archived capture of the pre-migration shipbuildinghistory.com URL is cited and labeled archived. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-03
-
[5]National Archives, Special List 44 - Ships' Logs Finding Aid, by Ship Numbers [other_primary]
- Locator
- sl-44-ship-number.pdf - PC-479 row: 4/30/1942 through 6/30/1945
- Finding type
- historical_record
- Finding
- NARA's deck-log finding aid catalogs surviving logbooks for this hull: row 'PC-479' shows log coverage 4/30/1942 through 6/30/1945 - the full commissioned period from commissioning through just after the Saidor/occupation-era Pacific service and before the China-service and Charleston decommissioning leg. These undigitized logs are the primary-source lead for daily operations, maintenance availabilities, and any recorded material work aboard.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1945 (log coverage)
- Population
- U.S. Navy crew and operations covered by the PC-479 deck-log series
- Limitations
- Finding aid lists log-coverage dates only; the underlying log pages were not reviewed and are not digitized - they may or may not contain material, insulation, or maintenance detail. Coverage ends 6/30/1945, so the China-service (Sep-Oct 1945) and disposal periods are outside the cataloged run.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-04
-
[6]GAO, Navy's Efforts to Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979) - full text retrieved live this session via firecrawl (gao.gov returns HTTP 403 to direct fetches) [gao]
- Locator
- GAO HRD-80-2 letter text - 'Navy's Policy on Use of Asbestos' section; ship-class insulation status table (Attachment 1)
- Finding type
- gov_survey
- Finding
- GAO program-level documentation of Navy shipboard asbestos: 'all ships contain some asbestos in such components as clutches and electric cables'; thermal insulation 'was the Navy's major use of asbestos aboard ships'; insulation product specifications were changed in 1973 to asbestos-free materials but stock already purchased was still installed - 'some ships were delivered with asbestos insulation as late as May 1978'; the Navy's elimination policy issued October 1975 and modified January 1979 to selective replacement in high-maintenance areas. A 1942-built Navy combatant sits inside the documented use era in full.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 (report); construction/service era context 1942-1946
- Population
- Navy shipyard workers and Navy vessels covered by the program review
- Limitations
- Program-level evidence only - GAO did not identify PC-479, its builder, its spaces, or any component aboard this hull; fieldwork yards were Long Beach and Norfolk Naval Shipyards, not Defoe. Supports era context, not any hull-specific fact. gao.gov blocks automated fetches (403); full text was pulled via firecrawl and the stable product URL is cited.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-05
-
[7]Era inference built on: NavSource PC-479 specification block (twin GM 16-258S diesel plant, serials 6333/6334); PC-461 construction era 1941-44; GAO HRD-80-2 program finding (see ev-05) [other_primary]
- Locator
- NavSource 010479.htm specifications; GAO HRD-80-2 (ev-05)
- Finding type
- asbestos_application
- Finding
- A PC-461-class submarine chaser completed in early 1942 sits inside the Navy's documented asbestos-use era (GAO HRD-80-2). Era-standard asbestos applications aboard a diesel-driven steel patrol craft of this size and period were: diesel-exhaust and muffler lagging; engine-space thermal and acoustic insulation; compressed-asbestos exhaust, cooling, and fuel-system flange gaskets and engine cylinder gaskets; valve-stem and machinery packing; electrical cable insulation; deck coverings; and winch/windlass brake linings. As a diesel vessel she carried no boilers or steam distribution - the boiler/turbine lagging pathway documented on steam vessels does not apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1947
- Population
- Defoe construction trades (1942); U.S. Navy crew 1942-46; MARCOM-disposal scrapping workers 1946-47
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, builder's specification, or work package located for PC-479. Names era-standard applications, not confirmed installed materials; no quantity; no manufacturer attribution. This inference cannot establish that asbestos was installed aboard this hull or that any person was exposed.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-06
-
[8]Batch-7854 search ledger (this record): NavSource PC-479; NHHC DANFS (404 - none exists); NVR (soft-404, hull outside coverage); uboat.net; shipbuildinghistory (live 500; Wayback capture used); NARA Special List 44; GAO HRD-80-2 (firecrawl full text); CourtListener authenticated base queries; secondary web sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-479-pc479-01 through -09
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record, or litigation naming USS PC-479 / PC-479 was found in the public sources searched (see search_ledger). CourtListener exact-name base queries 'USS PC-479' (opinion and docket) returned zero results; the hull-number base queries 'PC-479' (opinion and docket) hit the fleet-wide pacing stand-down before a result payload and are logged as blocked, not as a negative result - the litigation sweep is complete for the exact name only.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 research session
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1942 naval combatant sits squarely in the documented use era. The hull-number litigation sweep remains an open gap (pacing-blocked, not a negative finding); re-run '"PC-479"' opinion and docket queries when the limiter permits. NARA deck logs (4/30/1942-6/30/1945 per SL-44) are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-479-pc479-07