Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 940-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-792-pc792-pkt-940-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-792 (build data, specifications, strike/transfer dates, photographic record) [other_primary]
- Locator
- NavSource PC-792 page, timeline block + specifications block + photo captions
- Finding type
- vessel_history
- Finding
- Hull record for this vessel: PC-461-class submarine chaser laid down 22 March 1943 at Commercial Iron Works, Portland, OR; launched 24 April 1943; commissioned 10 April 1944; struck from the Naval Register 13 December 1946; transferred to the War Shipping Administration July 1948; fate unknown. Specifications: 450 t., 173'8" x 23' x 10'10", 20.2 kts., complement 65; armament one 3"/50 dual-purpose mount, one 40mm mount, five 20mm guns, two rocket launchers, two depth charge tracks; propulsion two 1,440 bhp Hooven-Owen-Rentschler R-99DA diesel engines, Westinghouse single reduction gear, two shafts. Photographic record places PC-792 tied up astern of Phoebe (AMc 57) with PC-786 at Dutch Harbor, Aleutians, c. 1943-45. NavSource explicitly notes 'There is no DANFS History currently available for PC-792.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Commercial Iron Works construction trades (1943-44); wartime and immediate postwar crew (design complement 65)
- Limitations
- NavSource is a curated third-party archive (the standard public index for hulls lacking DANFS coverage), not an official publication - data are compiled from official records but not a primary source themselves. Documents construction, service-theater and disposal data, not materials or asbestos content. Displacement figure (450 t.) conflicts with DANFS class design figure (280/284 t.) - see gaps. Dutch Harbor photo date range (c. 1943-45) is a contributor estimate spanning sister PC-786's arrival; PC-792 did not commission until April 1944.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-01
-
[3]NHHC Naval History Division, Modern Biographies research file: 'Rear Admiral Donald D. Chapman, Judge Advocate General's Corps, U.S. Navy, Retired' (Navy Office of Information, Internal Relations Division OI-430, 26 February 1971) [nhhc_danfs]
- Locator
- Chapman biography PDF, first page (assignment chronology paragraph)
- Finding type
- historical_record
- Finding
- Official Navy biography documenting this hull's service theater: Donald D. Chapman, USNR (later Rear Admiral, JAGC), after duty as Engineer Officer and Executive Officer of USS PC-566 (Atlantic, Sept. 1943-Feb. 1945), 'next commanded the USS PC 792, which operated in the North Pacific.' He returned to Headquarters, Eighth Naval District, in February 1946 - bounding his PC-792 command to roughly 1945 through early 1946.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-1946 (command); 1971 (publication)
- Population
- Wartime crew under D. D. Chapman (later RADM), North Pacific, c. 1945-46
- Limitations
- Names the hull and its operating theater only - no operational detail, no materials or asbestos content, and Chapman's exact assumption/relief dates within the Feb. 1945-Feb. 1946 window are not stated. Third-party aggregator uboat.net lists three wartime commanding officers (Harold G. Gibson, Howard E. Krobatsch, Donald C. Chapman - middle initial conflicts with the official bio's 'Donald D.') - corroborating but secondary.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-02
-
[4]MARAD Vessel History Database, 'PC-792 & 793' (General Type: Naval Combatant; fate field 'Sold - Foreign Flag Op.') + U.S. Maritime Commission Bureau of Government Aids Vessel Status Card (Form MC-7146a, 1/49) for PC 792 & 793 [marad_nrc]
- Locator
- Status card image https://vesselhistory.marad.dot.gov/cards/5I8_01.png (Operator/Port-of-Delivery rows); database detail page Detail/10253
- Finding type
- vessel_history
- Finding
- Government disposition record for this hull: the USMC vessel status card jointly covering PC 792 & 793 records 'Sold to Commercial Naviera S.A. by Grieve & Riley, Seattle, Wash.,' date and time delivered '4-7-49' (7 April 1949). The MARAD database entry assigns fate 'Sold - Foreign Flag Op.', consistent with sale into foreign-flag commercial operation through the Seattle broker Grieve & Riley. No subsequent history, renaming, or loss is recorded on the card; NavSource carries the ultimate fate as unknown.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1948-1949
- Population
- WSA/USMC custody transfer staff; foreign-flag purchasers (Commercial Naviera S.A.)
- Limitations
- Status card covers the two hulls jointly - the buyer and delivery apply to both vessels but the card does not distinguish post-sale identity between PC-792 and PC-793. Documents disposal only - no material condition, hazardous-material, or survey content. Buyer 'Commercial Naviera S.A.' is untraced in public sources; whether either hull entered naval, commercial, or other service afterward is undocumented.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-03
-
[5]DANFS, Bluffton I (PC-461) - official class-design statistics for the PC-461 class [nhhc_danfs]
- Locator
- DANFS Bluffton I (PC-461) entry, parenthetical statistics line
- Finding type
- vessel_history
- Finding
- Official class-level statistics for the type: '(PC-461: dp. 280; l. 173'8"; b. 23'0"; dr. 10'10"; s. 20.2 k.; cpl. 65; a. 2 3", 2 20mm., 2 .50-cal. mg., 2 .30-cal. mg., 2 dcp., 2 dct.; cl. PC-461)' - the DANFS spec block carried for PC-461 (lead ship, built George Lawley & Sons, Neponset, Mass.). PC-792 is a member of this 173'8" steel-hulled diesel-powered class; the class as-built armament and displacement in the DANFS line differ from the wartime fit NavSource carries for PC-792 (one 3"/50 vs. two 3"; 450 t. vs. dp. 280) - see gaps.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1944 (construction era)
- Population
- PC-461-class crews (design complement 65)
- Limitations
- Class-design data for the lead ship, not a PC-792 record - as-delivered wartime fits varied across yards and periods (armament, load condition behind displacement figures). No materials or asbestos content. Live NHHC page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-04
-
[6]Hedley-Whyte J, Milamed DR. 'Asbestos and Ship-Building: Fatal Consequences.' Ulster Med J. 2008 Sep;77(3):191-200 (PMID 18956802) [other_primary]
- Locator
- PMC2604477, 'Logistics of Asbestos' and 'Shipbuilding' sections (1922 Navy specification; 1942-44 conservation orders; consumption figures)
- Finding type
- asbestos_application
- Finding
- Peer-reviewed historical documentation of the wartime asbestos regime under which this hull was built: 'In 1922 the US Navy specified asbestos use in new submarines. South African chrysotile asbestos was specified for gaskets, insulation, packing and tape ... In 1939 the US classified asbestos as a critical material and stockpiling began.' 'On January 20, 1942, in preparation for this massive expansion of ship-building, the first Asbestos Conservation order was issued ... [it] essentially banned the use of asbestos for non-military purposes; priority was given to merchant and US and Royal Navy ship-building. In December 1942 ... these regulations were further tightened and not relaxed until December 1944.' US wartime asbestos consumption 'averaged 783 million pounds' annually. PC-792's construction window (laid down 1943-03-22; delivered/commissioned 1944) sits inside the tightened-conservation-order period.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1922-1944 (documented era); 2008 (publication)
- Population
- US naval-shipbuilding workforce and crews, WWII era (context)
- Limitations
- Era-level historical review, not a hull or class record - documents that wartime naval shipbuilding operated under asbestos-reserved supply and Navy material specifications, not what was installed aboard PC-792. Secondary scholarly synthesis citing primary regulations; ship-specific presence remains inference.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-05
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[7]Era inference built on: NavSource specifications (twin Hooven-Owen-Rentschler R-99DA diesels, geared, 2 shafts - diesel plant, no steam); DANFS PC-461 class statistics; wartime Navy asbestos-specification and supply-reservation context (Hedley-Whyte & Milamed 2008, ev-05) [other_primary]
- Locator
- NavSource specifications block; DANFS class statistics line; PMC2604477
- Finding type
- asbestos_application
- Finding
- A steel-hulled diesel-powered patrol craft built 1943-44 under wartime Navy contracting sits inside the documented Navy asbestos-specification era; era-standard applications aboard a vessel of this type and period were exhaust/muffler and machinery-space thermal insulation, gaskets, valve and flange packing, electrical insulation, fireproofing, and deck/bulkhead coverings. As a diesel vessel she carried no boiler or steam-line lagging - the dominant asbestos mass aboard steam combatants is absent - but the confined-space exposure dynamic of a 173-foot combatant (65-man design complement) applies to whatever insulating and sealing materials were fitted.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-1949+
- Population
- Commercial Iron Works construction trades (1943-44); crew 1944-46; WSA/USMC custody 1948-49; foreign-flag crews after 1949-04-07
- Limitations
- Class/era inference only - no hull-specific insulation schedule, material list, GIB, or work package located for PC-792. Names era-standard applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-06
-
[8]National Archives, 'Researching Asbestos aboard US Naval Vessel up through 1961' (research guide identifying the record series most responsive to naval-vessel asbestos research) [other_primary]
- Locator
- archives.gov guided-topic page, 'General Information Books' (Entry P 12) and 'Board of Inspection & Survey Reports' (Entry P 1-E) sections; https://catalog.archives.gov/id/1275932 and /id/2092723; deck-log series https://www.archives.gov/research/military/logbooks/navy
- Finding type
- historical_record
- Finding
- NARA's own asbestos-research guide identifies the record series in which hull-level material evidence for this vessel would sit if it survives: RG 19 (Bureau of Ships) General Correspondence 1940-45 series; RG 19 Entry P 12 'Patrol Craft General Information Books [Item S-68], 1902-1955' (NAID 1275932) - GIBs document ship systems deck by deck including piping, ventilation, heating, and machinery arrangements; and RG 38 Entry P 1-E 'Patrol Craft Material Inspection Reports and Related Documentation, 1940-1978' (NAID 2092723) - InSurv reports covering the hull's pre-commissioning material inspection. Deck logs for commissioned vessels 1941-1983 are held in RG 24 (Logbooks of U.S. Navy Ships and Stations). None of these series is digitized for PC-792; retrieval not performed.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 (lead status)
- Limitations
- Archival-lead row: the guide identifies responsive series but does not establish that PC-792 material exists in them, and no item-level retrieval was performed this session. Series presence does not itself evidence asbestos aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-07
-
[9]Batch-8165 search ledger (this record): NavSource hull page; NHHC ship-history index and officer-biography file; MARAD Vessel History Database + USMC status card; DANFS PC-461 class entry; HyperWar 'Ships of the U.S. Navy 1940-1945'; NARA asbestos research guide; CourtListener opinion/docket searches; secondary web sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-792-pc792-01 through -15
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS PC-792 was found in the public sources searched (see search_ledger). All four CourtListener base queries completed 2026-10-03: exact-name opinion and docket searches returned zero hits; hull-number searches returned only docket-number-fragment collisions (an Indiana post-conviction case and ten unrelated civil/bankruptcy/MDL dockets) - no qualifying asbestos litigation names this hull. No DANFS entry exists for this hull (NavSource notes none); NHHC holds no ship-history page for it beyond the officer-biography mention; the MARAD status card documents disposal only. 'Asbestos aboard PC-792' content on the web is law-firm marketing material asserting asbestos without primary sourcing - excluded by source policy.
- 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 - asbestos presence remains era- and design-level inference consistent with 1943-44 Navy construction. Deck logs, the patrol-craft GIB, InSurv material-inspection report, and WSA/USMC disposition files (RG 178) are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-792-pc792-08