Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
-
[1]research packet 943-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (thin sourcing
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Limitations
- qualifier: VERIFIED (thin sourcing
- Evidence ID
- uss-pc-821-pc821-pkt-943-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-821 page (live URL verified 2026-10-03; page states no DANFS history is available) [other_primary]
- Locator
- PC-821 page, timeline bullets and photograph table
- Finding type
- vessel_history
- Finding
- The PC-821 page identifies this hull as a PC-461-class submarine chaser: laid down 1 September 1943 by the Leathem D. Smith Shipbuilding Corp., Sturgeon Bay, WI; launched 23 October 1943; commissioned 23 June 1944; transferred to the War Shipping Administration in June 1948; sold 7 June 1948 and presumed scrapped. Call sign Nan-William-Yoke-Mike. The page carries a 15 January 1944 fitting-out-dock photograph (Great Lakes Institute photo by W. C. Schroeder) and states there is no DANFS history available for PC-821.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- PC-821 construction and operating crew
- Limitations
- NavSource is an archival compilation rather than a Navy publication; its page supplies the cited hull history but does not provide asbestos, materials, crew-exposure, or legal-eligibility information. Its 'War Shipping Administration' label for the June 1948 transfer is anachronistic - the WSA was dissolved in 1946 and the functional federal disposal entity in 1948 was the U.S. Maritime Commission (see gaps). No decommissioning or stricken date is stated.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-01
-
[3]NavSource PC-821 specification block [other_primary]
- Locator
- PC-821 page, specifications block
- Finding type
- vessel_history
- Finding
- The page gives this hull's specifications as 450 tons displacement, 173 feet 8 inches length, 23-foot beam, 10-foot 10-inch draft, 20.2-knot speed, and complement 65; armament one 3"/50 dual-purpose gun mount, one 40mm gun mount, five 20mm guns, two rocket launchers, two depth charge tracks. Propulsion: two 1,440-bhp Hooven-Owen-Rentschler R-99DA diesel engines (serial numbers 7005 and 7308), Westinghouse single-reduction gear, two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- PC-821 construction and operating crew
- Limitations
- The specification block is not a surviving-hull survey and does not identify insulation or other asbestos-containing products. It supports propulsion and vessel identity only; no ship-specific asbestos inference is made from the diesel machinery.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-02
-
[4]Shipbuilding History, Bay Shipbuilding (Sturgeon Bay WI) hull table + Commercial Iron Works hull table (shipbuildinghistory.njscuba.net) [other_primary]
- Locator
- Bay Shipbuilding table row '292 | PC-821'; Commercial Iron Works table row '94-98 | PC 821-825' (us-comm-small/commercial/)
- Finding type
- vessel_history
- Finding
- The yard tables document this hull's contract history and delivery: the Navy contract for PC-821 through PC-825 was originally assigned to Commercial Iron Works, Portland, Oregon (yard hull numbers 94-98) and 'transferred to Leathem D. Smith'; the Bay Shipbuilding predecessor table lists PC-821 as Leathem D. Smith yard hull 292, type subchaser, 284 GT, 174 ft LOA, delivered 23 June 1944, 'to MARAD 1948'. The Leathem D. Smith companies (Towing & Wrecking, Dock, Shipbuilding & Dry Dock) later became Christy Corp., one of the two yards consolidated into Bay Shipbuilding in 1967.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Leathem D. Smith Shipbuilding construction trades (1943-44)
- Limitations
- A secondary shipbuilding-industry compilation, not a contract document; it corroborates builder, delivery date, and 1948 federal disposal but contains no asbestos, materials, or service content. 'To MARAD 1948' is itself anachronistic - MARAD was created in 1950; the June 1948 disposal entity was the U.S. Maritime Commission (see gaps).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-03
-
[5]uboat.net, Allied Warships, USS PC-821 (PC-821) - build table and commanding-officer listing [other_primary]
- Locator
- uboat.net warship record 8648, build table and 'Commands listed' section
- Finding type
- vessel_history
- Finding
- uboat.net's hull record gives ordered 23 August 1942; laid down 1 September 1943; launched 23 October 1943; commissioned 23 June 1944; builder listed as 'Leatham D. Smith Shipbuilding Co. (Sturgeon Bay, Wisconsin)'. Its wartime command listing gives Lt. Dunbar Holmes, USNR, in command 23 June 1944 to mid-1945, and Lt. M. B. Dickinson, USNR, mid-1945 to 1 April 1946. The service 'History' field is empty - no wartime narrative is published for this hull.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- PC-821 commanding officers and crew (1944-1946)
- Limitations
- uboat.net is a secondary warship database; its dates corroborate NavSource but it is not a primary source, and its empty 'History'/'End service' fields confirm the absence of a published wartime narrative rather than establishing any fact of service. The 1 April 1946 command-end date suggests the inactivation window but is not a documented decommissioning date.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-04
-
[6]U.S. Navy Bureau of Ships, Ships' Data, U.S. Naval Vessels, 1945, Vol. II (NAVSHIPS 250-011, 13 April 1945), patrol-vessel machinery and builder tables (shipscribe.com scan) [other_primary]
- Locator
- NAVSHIPS 250-011, patrol-vessel machinery table (PC807-PC825 block) and builder/date table (Leathem D. Smith rows)
- Finding type
- vessel_history
- Finding
- The official BuShips registry publication lists PC-821 in its April 1945 patrol-vessel tables: builder table shows 'Leathem D. Smith S.B., Corp., Sturgeon Bay, Wis.' with dates 1 Sept 43 (laid down), 23 Oct 43 (launched), 23 Jun 44 (delivery/completion) - matching NavSource. The machinery table lists PC-821 with 'H. O. R. RB-99DA' engines at 2,560 bhp and 19.0 knots - a DIFFERENT line entry from the Albina-built PC-815 through PC-820 block ('H. O. R. R-99DA', 2,880 bhp, 20.2 knots) and from NavSource's 2 x 1,440-bhp R-99DA / 20.2-kt figure for this hull; the registry thus records a heavier-powered variant or a different rating for the Leathem Smith-built block. PC-821 does not appear in the volume's lend-lease transfer lists.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1945
- Population
- BuShips registry data for PC-821 construction trades and crew
- Limitations
- Official U.S. Navy publication, dated April 1945 - contemporaneous registry data, not an asbestos or materials record. The RB-99DA / 2,560-bhp / 19.0-kt entry conflicts with NavSource's R-99DA / 2 x 1,440-bhp / 20.2-kt specification for this hull; the discrepancy is carried in gaps rather than resolved. Does not establish insulation content, quantities, or any exposure fact.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-05
-
[7]NavSource PC-821 page, PC-461-class designation and propulsion specifications [other_primary]
- Locator
- PC-821 page, class designation and propulsion lines
- Finding type
- asbestos_application
- Finding
- Class/era context only: a steel-hulled PC-461-class submarine chaser built in 1943-44 with twin diesel propulsion falls within the period in which Navy vessels commonly used asbestos insulation and related products. For a diesel small craft, plausible applications include machinery or exhaust insulation, gaskets, valve packing, and electrical insulation; no boiler or steam-pipe lagging pathway is established for this hull.
- Verification
- inferred
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- 1943-1948 construction and Navy operating personnel
- Limitations
- This is an inference from class, construction era, hull type, and propulsion, not documentation that asbestos was installed aboard PC-821. It does not establish product identity, quantity, location, remaining material, exposure, causation, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-06
-
[8]GAO HRD-80-2, Navy Efforts To Protect Workers From Asbestos Exposure (program-level context) [gao]
- Locator
- GAO HRD-80-2 product page
- Finding type
- gov_survey
- Finding
- GAO's Navy program review is context for the Navy's historical use and later management of asbestos insulation in shipyard work; it does not name PC-821 or establish materials aboard this hull.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1975-1979
- Population
- Navy shipyard workers covered by the program review
- Limitations
- Program-level source only. The report is not a PC-821 survey, does not identify this hull, and does not establish asbestos presence, product identity, quantity, or exposure aboard PC-821.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-07
-
[9]Accessible-source search and four-query CourtListener sweep ledger for this record [other_primary]
- Locator
- search_ledger rows sl-uss-pc-821-pc821-01 through sl-uss-pc-821-pc821-11
- Finding type
- historical_record
- Finding
- No ship-specific asbestos documentation was located in the accessible non-CourtListener sources searched. Of the four required CourtListener base queries, the exact-name opinion query returned 7 results - all classified as name collisions (token matches in unrelated opinions; no asbestos case, no vessel context). The remaining three base queries (exact-name docket, hull-number opinion, hull-number docket) were pacing-blocked by the fleet limiter in this session; litigation status therefore remains partially unresolved rather than negative.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- A failed or pacing-blocked search is not a no-result search. This row does not establish that no litigation exists - one base query returned only name collisions and three remain unrun. It records the accessible-source negative finding and the CourtListener gap; no exposure, product, causation, merits, or legal-eligibility conclusion may be drawn.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-821-pc821-08