Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
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[1]research packet 876-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (identity confirmed; construction/commissioning dates not located in available sources
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-1257-pc1257-pkt-876-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-1257 (live page verified 2026-10-03) [other_primary]
- Locator
- PC-1257 page: milestone paragraph and specifications block
- Finding type
- vessel_history
- Finding
- The ship-specific page identifies PC-1257 as a PC-461-class submarine chaser built by Luders Marine Construction Co. at Stamford, Connecticut; laid down 24 November 1943; launched 23 July 1944; commissioned 21 December 1944; struck from the Naval Register 12 April 1946; transferred to the Maritime Commission 15 March 1948; sold to Portugal as NRP Santiago (P 583); used for air/sea rescue in the Azores until 1957, then island transport from Madeira; posted to Luanda in 1960; decommissioned there in 1967 and scrapped. The page gives 450-ton displacement, 173 ft 8 in length, 23 ft beam, 10 ft 10 in draft, 20.2-knot speed, complement 65, and twin 1,440-bhp Hooven-Owens-Rentschler R-99DA diesels on two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1967
- Population
- Luders construction trades; US Navy crew; Portuguese Navy crew
- Limitations
- Ship-specific identity and service record, but NavSource is a photographic-history compilation rather than a Navy registry or material survey. It contains no asbestos finding, no maintenance or abatement record, and no exposure evidence. The page's 1946 striking date and 1967 scrapping statement are carried as reported; the underlying disposal and Portuguese Navy records were not located.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-01
-
[3]National Archives, Special List #44, by Ship Numbers (ship logbook index PDF) [other_primary]
- Locator
- PDF p. 67, row 'PC-1257 12/21/1944 6/30/1945'
- Finding type
- historical_record
- Finding
- NARA's ship-number list includes PC-1257 with a logbook coverage interval beginning 21 December 1944 and ending 30 June 1945. This confirms an archival lead for the ship's commissioned-period deck/log records and independently matches the commissioning date reported by the ship-specific history.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-12-21 to 1945-06-30
- Population
- PC-1257 crew and ship operations during the indexed logbook period
- Limitations
- The list is an index, not the logbook content. It establishes the listed coverage dates but does not identify crew, voyages, materials, asbestos, or exposure. The underlying logbooks were not retrieved or page-read for this record.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-02
-
[4]Naval History and Heritage Command, United States Pacific Fleet Organization, 1 May 1945 [other_primary]
- Locator
- PC 1257 row in the 1 May 1945 organization table
- Finding type
- historical_record
- Finding
- The official Navy organization listing includes PC 1257 and identifies Lt. R. Wellington, USNR, as commanding officer on 1 May 1945. This places the hull in the Pacific Fleet organization at that date and supports the ship-specific command association reported by the photographic-history record.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-05-01
- Population
- PC-1257 command and crew on 1945-05-01
- Limitations
- The organization table is a point-in-time command listing, not a full operational history and not an asbestos or materials record. It does not establish a complete crew complement, voyage history, or exposure event.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-03
-
[5]U.S. General Accounting Office, HRD-80-2, Navy Efforts To Protect Workers From Asbestos Exposure (18 October 1979; live PDF verified) [gao]
- Locator
- Report summary and 'Navy's Policy on Use of Asbestos' section
- Finding type
- asbestos_application
- Finding
- GAO reports that the Navy told investigators all ships contained some asbestos in components such as clutches and electric cables, that thermal insulation was the Navy's major use of asbestos aboard ships, and that the Navy's policy to eliminate asbestos as an acceptable thermal-insulation material was issued in October 1975. This supplies Navy-wide era context relevant to a 1944-built diesel patrol craft.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1944 construction/service era; GAO review 1979
- Population
- Navy shipyard workers and Navy ships in the GAO review; era context for PC-1257
- Limitations
- Program-level evidence from a review of Long Beach and Norfolk Naval Shipyards; it does not name PC-1257, identify its installed materials, establish asbestos content in any component aboard this hull, or prove exposure. The class/era inference is therefore not a ship-specific finding.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-04
-
[6]NHHC DANFS canonical URL check for PC-1257 [nhhc_danfs]
- Locator
- Canonical DANFS URL check; NavSource page's 'no DANFS history available' note
- Finding type
- vessel_history
- Finding
- No live NHHC DANFS entry for PC-1257 was located: the canonical PC-1257 URL returned HTTP 404 when checked on 2026-10-03, and the ship-specific NavSource page explicitly states that no DANFS history is available for this hull.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1946
- Population
- PC-1257 archival record
- Limitations
- A missing DANFS entry is an access/catalogue finding, not evidence that the ship lacked a Navy history or that no other official record exists. No claim about asbestos or exposure follows from the absence.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-05
-
[7]Naval Vessel Register historical-detail URL check for PC-1257 (live NVR site verified 2026-10-03) [other_primary]
- Locator
- NVR PC-1257 detail URL and site note on pre-1987 disposals
- Finding type
- vessel_history
- Finding
- The current NVR detail URL does not provide a PC-1257 historical vessel record. The NVR site explains that ships and service craft disposed of before 1987 are not currently included in its historical data set in general; PC-1257 was reported scrapped in 1967.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1967; NVR site checked 2026-10-03
- Population
- PC-1257 historical registry record
- Limitations
- This is a current-register catalogue finding, not evidence that PC-1257 was never registered or that no historical Navy disposition file exists. It does not establish asbestos status or exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-06
-
[8]Batch-7752 source review and search ledger [other_primary]
- Locator
- Search ledger rows sl-uss-pc-1257-pc1257-01 through -11
- Finding type
- asbestos_application
- Finding
- No ship-specific asbestos survey, abatement record, hazardous-material disclosure, asbestos product identification, or verified exposure record for PC-1257 was located in the authoritative sources reviewed for this batch. The record therefore carries no ship-specific asbestos finding and remains Tier 2 based on class/era context only.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1967
- Population
- PC-1257 construction trades, US crew, Portuguese crew, and later maintenance workers
- Limitations
- This is a bounded negative finding, not proof that no such record exists. The CourtListener litigation sweep was stopped after the authenticated helper reported the fleet-wide pacing stand-down on the first attempted base query; litigation status remains an open gap rather than a negative result.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1257-pc1257-07