Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
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[1]research packet 862-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (thin sourcing disclosed below)
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Limitations
- qualifier: VERIFIED (thin sourcing disclosed below)
- Evidence ID
- uss-pc-1147-pc1147-pkt-862-packet-md
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[2]NavSource Online: Submarine Chaser Photo Archive, PC-1147 - construction milestones, specifications, disposal (verified live 2026-10-03) [other_primary]
- Locator
- NavSource 12/011147.htm header block (PC-461 Class Submarine Chaser) and Specifications block
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: PC-461-class submarine chaser; laid down 11 October 1943 by the Defoe Shipbuilding Co., Bay City, Michigan; launched 2 December 1943; commissioned 12 August 1944; decommissioned at Subic Bay, Philippines; transferred 30 April 1948 to the State Department, Foreign Liquidation Commission and sold; fate unknown. Call sign Nan-How-Able-Able (NHAA). Specifications: displacement 280 t. (lt), 450 t. (fl); length 173'8"; beam 23'; draft 10'10"; speed 20.2 kts; complement 65; armament one 3"/50 dual-purpose mount, one 40mm mount, three 20mm guns, two rocket launchers, four depth-charge projectors, two depth-charge tracks; propulsion two 1,440 bhp General Motors 16-278A diesel engines, Farrel-Birmingham single reduction gear, two shafts. Page states 'There is no DANFS History currently available for PC-1147.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Defoe construction trades (1943-44); wartime crew (1944-46, complement 65); any post-sale operators (unknown)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry; its milestone dates generally track NVR/DANFS but this hull has no DANFS entry and no NVR entry (disposed pre-1987), so build/disposal details rest on this compilation and the Defoe yard list. Decommissioning date and stricken date are not stated. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-01
-
[3]uboat.net Allied Warships of WWII, USS PC-1147 (PC-1147) - build/order data, commanding officers, notable events (verified live 2026-10-03) [other_primary]
- Locator
- uboat.net ship page 8692 - data table, 'Commands listed' section, 'Notable events' entries of 11 and 17 October 1944
- Finding type
- vessel_history
- Finding
- uboat.net record for this hull: ordered 27 February 1942; built by Defoe Shipbuilding Co., Bay City, Michigan; laid down 11 October 1943; launched 2 December 1943; commissioned 12 August 1944. Commanding officers listed: Lt. John A. Hickman, USNR (12 August 1944 - mid 1945) and William D. Fagan, USNR (mid 1945 - early 1946). Notable events: October 1944 - USS Devilfish (SS-292, T/Cdr. E.C. Stephan, USN) departed New London 11 October 1944 for Key West; PC-1147 (Lt. J.A. Hickman, USNR) joined her at position D in the vicinity of the Bahamas for onward escort; Devilfish arrived Key West about noon 17 October 1944 having been escorted by PC-1147 since the Bahamas vicinity.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1946
- Population
- Crew under Lt. Hickman (Oct 1944 escort duty)
- Limitations
- uboat.net is a reputable secondary compilation; the escort event is transcribed from USS Devilfish's patrol/movement record. Establishes an Atlantic-side escort assignment in October 1944 and the wartime CO sequence; contains no asbestos content and does not establish where any individual served below decks.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-02
-
[4]HyperWar, 'Ships of the U.S. Navy, 1940-1945: Submarine Chasers' - PC commission-window and loss-annotation listing (verified live 2026-10-03) [other_primary]
- Locator
- ships-sc.html, 'PC Submarine Chasers (Steel Hull)' table, PC-1141-1147 row
- Finding type
- vessel_history
- Finding
- The HyperWar 'Ships of the U.S. Navy, 1940-1945' subchaser listing (compiled by Patrick Clancey from official sources) groups PC-1141 through PC-1147 in the 1942-44 commission block and carries no loss annotation (dagger) for PC-1147 - she survived the war and was not among the class's wartime losses (e.g., PC-496 mined at Bizerte, PC-1129 suicide-boat loss off Luzon, both annotated).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1945 (listing window)
- Limitations
- Secondary compilation built from official records; establishes commission-window and survival of the war, not operational detail or materials. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-03
-
[5]Shipbuilding History, 'Defoe Shipbuilding' production list (yard hull numbers and dispositions); mirrored at Naval Marine Archive (navalmarinearchive.com/sbh/shipyards/large/defoe.html) (verified live 2026-10-03) [other_primary]
- Locator
- shipbuildinghistory.njscuba.net Defoe table, hull 232 row
- Finding type
- vessel_history
- Finding
- The Defoe Shipbuilding production list records PC-1147 as yard hull number 232, type 'subchaser', 173 ft, delivered/commissioned 12 August 1944, with disposition noted 'to MARAD 1946' - which conflicts with NavSource's more detailed record of decommissioning at Subic Bay and transfer to the State Department Foreign Liquidation Commission on 30 April 1948. The yard list also confirms the build block: sisters PC-1144 through PC-1149 were Defoe hulls 229-234, all PC-461-class subchasers.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Defoe Shipbuilding construction trades (1943-44)
- Limitations
- Secondary yard-list compilation; the 'to MARAD 1946' entry conflicts with NavSource's FLC-1948 disposal and may reflect an intermediate administrative step (e.g., reserve/stricken pipeline) or an error - unresolved, carried in gaps. Establishes the yard hull number and the Defoe production context. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-04
-
[6]Era inference built on: NavSource specifications (two GM 16-278A diesels, Farrel-Birmingham gear, two shafts - no steam plant); PC-461 class literature; GAO HRD-80-2 (see ev-uss-pc-1147-06) [other_primary]
- Locator
- NavSource specifications block; PC-461 class literature (173-ft steel diesel subchaser)
- Finding type
- asbestos_application
- Finding
- A PC-461-class submarine chaser built 1943-44 sits inside the Navy's documented asbestos-use era; era-standard applications aboard a small diesel craft of this period were thermal insulation, machinery and diesel-exhaust lagging, gaskets, valve packing, and electrical insulation in a confined 173-foot hull volume. As a diesel craft she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply - but the confined-space exposure dynamic of small-craft engineering spaces applies.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Defoe construction trades (1943-44); crew (1944-48); any post-1948 civilian operators (unknown)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, builder's specification sheet, or work package located for PC-1147. Names era-standard applications, not confirmed installed materials. No quantity. Defoe Shipbuilding has no located government/official asbestos documentation (no NIOSH HHE or GAO fieldwork identified for this yard); law-firm pages asserting Defoe asbestos use are excluded by source policy.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-05
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[7]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2
- 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 construction (1943-44) and service era (1944-48).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- 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 this session; content via product-page description. gao.gov has blocked automated fetches in prior batch sessions (HTTP 403).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-06
-
[8]Batch-7661 search ledger (this record): NavSource (live); uboat.net Allied Warships + commanders pages (live); HyperWar 'Ships of the U.S. Navy, 1940-1945' subchaser list (live); Shipbuilding History / Naval Marine Archive Defoe production list (live); NHHC DANFS (no entry exists); NVR (predates coverage); CourtListener (blocked); NARA deck-log lead; secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-1147-01 through sl-uss-pc-1147-09
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming PC-1147 was found in the public sources searched (see search_ledger). CAVEAT: CourtListener could not be queried this session - the authenticated helper reported the fleet-wide daily quota exhausted with a ~3.4-hour server-requested wait; logged as blocked, not a negative result. Secondary web sweeps surfaced no qualifying case; the only 'asbestos aboard' material is law-firm marketing content (Defoe Shipbuilding and PC-class listicles on mesothelioma.net, mesothelioma.com, mesotheliomalawyercenter.org, mesowatch.org) asserting asbestos without primary sourcing - excluded by source policy. Basner v. Defoe Shipbuilding Co., 319 Mich. 67 (1947), names the builder but is a workmen's-compensation fall case, not asbestos - non-qualifying.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - and the litigation-repository search is a genuine open gap (quota-blocked, not run). Deck logs (NARA RG 24), Defoe construction records, and FLC sale paperwork are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1147-07