Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 893-packet.md (3 sources cited) [museum_official]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-463-pc463-pkt-893-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive - 'PCC-463 ex-PC-463' page, and NavSource Submarine Photo Archive USS Trutta (SS-421) page navsource.net/archives/08/08421.htm (volunteer archival compilations, not official records; PC-463 page states no DANFS history exists) [other_primary]
- Locator
- NavSource PCC-463 page, chronology block + specifications block + CO table + photo captions
- Finding type
- vessel_history
- Finding
- Chronology and specifications for this hull: laid down 10 August 1941 by George Lawley and Sons, Inc., Neponset, Massachusetts; launched 27 February 1942 (Boston Public Library launch photo); commissioned USS PC-463 29 April 1942; c. May 1942 at Submarine Chaser Training Center, Miami, FL (NARA photo 80-G-14658); reclassified Control Submarine Chaser PCC-463 20 August 1945; damaged by grounding during Typhoon Louise October 1945; repaired at Yokosuka, Japan; decommissioned 1 March 1947 at Green Cove Springs, FL, laid up Atlantic Reserve Fleet, Florida Group; sunk as a target 20 July 1953 ~75 miles NW of Key West, FL (25deg56'48"N, 82deg52'30"W) by USS Trutta (SS-421) using an experimental Mk 28 torpedo (Trutta's own NavSource record confirms her posting to Submarine Squadron 4 at Key West, FL, from January 1953 - consistent with the reported sinking location); earned two battle stars for the Iwo Jima and Okinawa landings. Specs: 280 t.(lt)/450 t.(fl); 173'8" x 23' x 10'10"; 20.2 kts; complement 65; two 1,440bhp Fairbanks Morse 38D8 1/8 diesels (SN 832237/832238), Westinghouse single reduction gear, two shafts. CO recorded: LT J. E. Palmer, USNR, 1945.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1953
- Population
- Wartime and occupation-era crew (complement 65); George Lawley and Sons construction trades 1941-42; Yokosuka repair crews 1945
- Limitations
- Volunteer-compiled archival record, not an official source - the only comprehensive service chronology available for this hull (no DANFS entry exists). Key dates corroborated by official records where checkable (NARA SL-44 confirms 4/29/1942 log start; Awards Manual confirms Asia occupation service 29 Sep 45 - 10 Jan 46). The Typhoon Louise grounding claim is NOT corroborated: the hull does not appear in the official typhoon report's Appendix III damage list (see ev-06). Two-battle-stars claim not independently verified against an official battle-star list. Documents service history only - no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-01
-
[3]National Archives and Records Administration, Special List 44 - 'List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units' (ship-number index of deck-log holdings) [other_primary]
- Locator
- SL-44 ship-number index, PC-463 row (p. ~180 of PDF; 'PC-463 4/29/1942 6/30/1945')
- Finding type
- historical_record
- Finding
- Official NARA index of Navy deck-log holdings lists PC-463 with logbook coverage 4/29/1942 - 6/30/1945. The index's start date coincides with the commissioning date given by NavSource, independently corroborating in-scope U.S. Navy service from 29 April 1942 through at least 30 June 1945 - covering the Iwo Jima and Okinawa periods for which battle stars are claimed.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-04-29 to 1945-06-30 (coverage shown)
- Population
- Ship's company recorded in deck logs 1942-1945
- Limitations
- Index of holdings only - establishes that deck logs exist for this hull across the stated window, not their contents; log entries themselves are not digitized in this index and were not reviewed. Coverage shown ends 6/30/1945, a common index truncation point - it does not establish that later logs (through the March 1947 decommissioning) are absent. The index is a holdings record, not a commissioning certificate; the date match corroborates but does not by itself prove the commissioning date. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-02
-
[4]U.S. Navy and Marine Corps Awards Manual, 1953 (NAVPERS 15,790), Part IV - Navy Occupation Service Medal, units eligible: ships (verbatim transcription via HyperWar/ibiblio) [other_primary]
- Locator
- Awards Manual 1953, Part IV (ibiblio split file Awards_2.htm, 'Sections 17 through 21'), 'II. UNITS ELIGIBLE - Continued, (A) SHIPS Continued' - table 'Name of ship | Occupation service | Clasp | China Service | Dual eligibility', row 'PC 463 | 29 Sep 45 - 10 Jan 46 | A'
- Finding type
- historical_record
- Finding
- Official Navy awards manual lists 'PC 463' among units eligible for the Navy Occupation Service Medal with occupation service 29 September 1945 - 10 January 1946, clasp 'A' (Asia). This places the hull (by then redesignated PCC-463) in the Asia occupation area through the period that includes the reported Typhoon Louise grounding (9 October 1945, Okinawa) and the Yokosuka repair - independent official corroboration of the post-surrender Japan/Okinawa deployment window.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-09-29 to 1946-01-10 (eligibility window); manual published 1953
- Population
- Ship's company during occupation duty 1945-46
- Limitations
- Documents eligibility for an occupation medal during a date window only - it does not state the ship's specific locations, does not mention Typhoon Louise or any grounding or repair event, and does not itself verify the battle stars claimed elsewhere. Medal-eligibility listing establishes presence in the qualifying area during the window, not necessarily continuous presence. Transcription hosted on HyperWar/ibiblio mirror; text verified against the rendered table. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-03
-
[5]Patrol Craft Sailors Association, '173-Foot Steel-Hull Patrol Craft (PC, 461-Class)' - class program and PCC conversion page (veterans' association compilation) [other_primary]
- Locator
- ww2pcsa.org 'PC's Converted to PCC's' and 'PC World War II Service' sections
- Finding type
- vessel_history
- Finding
- Class context for the PCC designation: 35 PCs were converted to Patrol Craft, Control (PCC) for use in amphibious landing operations; conversions replaced single 20mm guns with four twin-mount 20mm guns and fitted SU radar in place of the earlier SF or SL radar; hull numbers were unchanged. PC-461-class design role was ASW, convoy escort, and coastal patrol; PCCs controlled and guided waves of landing craft.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1945 era
- Limitations
- Class-level veterans' association compilation, not an official record - describes the PCC conversion program and class role generally, not this hull's individual conversion work (conversion location and scope for PCC-463 are undocumented). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-04
-
[6]Design-bounded assessment compiled from the NavSource specifications for this hull (ev-01) and the documented PC-461-class configuration (diesel engines, steel hull, no steam plant) [other_primary]
- Locator
- navsource.net/archives/12/010463.htm specifications block (propulsion line); ww2pcsa.org class characteristics
- Finding type
- asbestos_application
- Finding
- Design-level assessment of the asbestos-relevant profile: this hull carried two 1,440bhp Fairbanks Morse 38D8 1/8 diesel engines on two shafts - no boilers, no steam distribution system, no turbines. The principal asbestos vectors documented aboard steam-era naval vessels - boiler and steam-drum lagging, steam-line insulation, turbine and condenser insulation - are absent by design in this type. Residual era-typical applications remain plausible but are undocumented for this hull: diesel exhaust and muffler insulation, engine gaskets and packing, electrical insulation, joiner/fireproofing materials, and brake linings on winch/windlass gear.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1953
- Population
- Ship's company 1942-47 (complement 65); construction trades at George Lawley and Sons, Neponset, 1941-42; Yokosuka repair crews 1945
- Limitations
- Class/design inference, not a ship-specific finding: the absence of a steam plant removes the dominant asbestos vectors but does not prove the absence of asbestos aboard - WWII-era gaskets, packing, electrical components, and interior materials could still contain asbestos, and the Navy's outfitting specifications for this contract are unretrieved. Nothing in the cited sources names an asbestos product installed on this hull. Does not establish presence, absence, exposure, or causation for any individual.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-05
-
[7]'Typhoon "Louise" - The 9 October 1945 Storm at Okinawa' - transcription of the official Navy storm report including Appendix III 'Typhoon Damage at Okinawa (Based Upon Progress Reports)' (archived copy; live ussyms425.com page not reachable) [other_primary]
- Locator
- Archived transcription, Appendix III table (PC-class rows)
- Finding type
- historical_record
- Finding
- The official report's Appendix III ship-by-ship damage list (12 sunk, 222 grounded, 32 damaged beyond ships'-force repair) does NOT include PC-463 or PCC-463 - eleven PC-class hulls are listed (PC 584, 814, 590, 1018, 1120, 1128, 1238, 1418, 1419, 1461, 1126) but not this one. NavSource's claim that this hull grounded during Typhoon Louise and was repaired at Yokosuka is therefore uncorroborated by the official damage list reviewed.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-10-09/18 (storm and reporting window)
- Limitations
- Absence from Appendix III does not disprove the NavSource grounding claim - the appendix is explicitly 'based upon progress reports' (sifted by ~18 October) and may omit ships that grounded and refloated quickly, were damaged at anchorages outside the report's scope, or were repaired without reaching reportable status. The claim stands on NavSource alone (verification partial in ev-01). The document is an archived transcription of the official report; original lives in Navy records.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-06
-
[8]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 during WWII - the era and program context in which this steel-hulled diesel patrol craft was built (1941-42) - and that wartime demand drove unprecedented asbestos utilization across naval construction.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1940s era documented; article 1987
- Population
- WWII shipyard workers and ship crews (era context)
- Limitations
- Era-level scholarship on WWII shipbuilding generally; does not name this vessel, the PC-461 class, or the Lawley yard, and does not establish that asbestos was or remains aboard this hull, nor quantity, location, condition, individual exposure, or causation. Its ship-construction framing applies most strongly to the construction trades at the builder's yard rather than to the crew of a small diesel craft.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-07
-
[9]Batch-7838 search ledger (this record): NavSource PC-463 page; NARA Special List 44; Navy and Marine Corps Awards Manual 1953 (HyperWar); official Typhoon Louise report transcription (archived); NVR ship-detail pages; WW2PCSA class pages; web-level litigation search; CourtListener API v4 (see sl-uss-pc-463-pc463-08 for status) [other_primary]
- Locator
- search_ledger rows sl-uss-pc-463-pc463-01 through sl-uss-pc-463-pc463-10
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming PC-463 or PCC-463 was found in the public sources searched (see search_ledger). No DANFS entry exists for this hull.
- 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 - the hull's 1941-42 wartime construction is era-consistent with retained asbestos components in gaskets, packing, electrical, and fireproofing materials. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility. CourtListener sweep was blocked by the fleet pacing gate this session (sl-08: blocked, not a negative result); web-level litigation search returned no qualifying case.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-08
-
[10]NARA record-path mapping: RG 24 deck logs for PC-463 (1942-04-29 to 1945-06-30 per SL-44); possible later-period logs through the 1947 decommissioning; BuShips contract and outfitting specifications for the Lawley hull; Green Cove Springs reserve-fleet inactivation records [other_primary]
- Locator
- SL-44 entry (ev-02) as the index pointer; catalog.archives.gov (JS-rendered, pending)
- Finding type
- historical_record
- Finding
- Archival leads not pursued: (1) the RG 24 deck logs themselves (Apr 1942 - Jun 1945 per SL-44, plus any later coverage) - the primary source for the Typhoon Louise grounding and Yokosuka repair, the ship's Iwo Jima/Okinawa stations, and 1942-45 escort itinerary; (2) BuShips/Bureau of Ships contract, plan, and outfitting specifications for the Lawley-built hull - the only likely source for hull-level materials documentation; (3) Atlantic Reserve Fleet inactivation/disposal records at Green Cove Springs for the stricken and target-transfer dates not located in published sources.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Limitations
- Unretrieved archival leads - identifies where hull-level records likely exist, not what they contain. Retrieval status unknown; NARA catalog is JS-rendered and did not return record-level metadata to automated fetch this session.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-463-pc463-09