Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
-
[1]research packet 901-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-523-pc523-pkt-901-packet-md
-
[2]GlobalSecurity.org, PC 173-Foot Submarine Chaser (class history page, verified live 2026-10-06) [other_primary]
- Locator
- Class description paragraph: built series PC-461 to PC-496, PC-542 to PC-627, PC-776 to PC-826, PC-1077 to PC-1265
- Finding type
- historical_record
- Finding
- The PC-461 class of 173-foot steel submarine chasers was built in four blocks: PC-461 to PC-496 (36 hulls), PC-542 to PC-627 (86), PC-776 to PC-826 (51), and PC-1077 to PC-1265 (189). Hull numbers PC-497 through PC-541 were never built. PC-523 falls inside the never-built PC-497 to PC-541 block.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- class_or_era
- Accessed
- 2026-10-06
- Study period
- 1941-1945
- Population
- PC-461-class hull-number blocks
- Limitations
- Secondary class-history compilation, not a Navy primary record. Establishes the hull-number block was never built; no contradicting completion record was located.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-01
-
[3]HullNumber.com, U.S. Patrol Craft Rosters (PCRF), verified live 2026-10-06 [other_primary]
- Locator
- Roster table: PC-496 row followed directly by PC-542 row; PC-623 row followed directly by PC-625 row
- Finding type
- historical_record
- Finding
- HullNumber.com patrol-craft roster lists PC-496 immediately followed by PC-542, and PC-623 immediately followed by PC-625. Hull numbers PC-497 through PC-541 (including PC-523) and PC-624 are absent from the roster, independently corroborating the unbuilt PC-497 to PC-541 block.
- Verification
- verified
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-06
- Population
- PC-series hull roster
- Limitations
- Enthusiast-compiled roster, not a Navy primary record. Used only to corroborate the class-history block structure.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-02
-
[4]NHHC site search (history.navy.mil) for PC-523; no DANFS entry returned [other_primary]
- Locator
- Search conducted 2026-10-06 via web search engine scoped to history.navy.mil
- Finding type
- historical_record
- Finding
- No Naval History and Heritage Command (DANFS) ship-history page for PC-523 was located. A site-scoped search of history.navy.mil for PC-523 returned no DANFS entry.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Limitations
- Search-engine scoping is an imperfect proxy for the NHHC archive. Consistent with, but does not alone prove, the absence of a DANFS entry; combined with the unbuilt-block finding, no commissioned vessel is documented.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-03
-
[5]GlobalSecurity.org, PC 173-Foot Submarine Chaser (verified live 2026-10-06) [other_primary]
- Locator
- Class description: 173-foot steel PC vs 110-foot wooden SC classes
- Finding type
- historical_record
- Finding
- PC-523 is a Patrol, Coastal hull number in the 173-foot steel PC-461 class, not a Submarine Chaser SC hull. The 110-foot wooden SC-497 class used the SC designator; SC-523 is likewise absent from the documented SC-497-class series. The two designations must not be conflated.
- Verification
- verified
- Role
- correction
- Documentation level
- class_or_era
- Accessed
- 2026-10-06
- Study period
- 1941-1945
- Population
- PC-461 and SC-497 classes
- Limitations
- Class-level distinction only; establishes the correct frame for the hull number, not facts about a completed PC-523.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-04
-
[6]Prior-session search-ledger lead (secondary web results); excluded for lack of primary verification [other_primary]
- Locator
- Prior BATCH-7898-REPORT.md search ledger entry sl-uss-pc-523-pc523-06
- Finding type
- historical_record
- Finding
- A secondary-source suggestion that PC-523 was redesignated YP-77 (and lost in a 1942 collision) was excluded. A 173-foot steel PC hull redesignated as a yard patrol craft is dimensionally implausible, and no primary source verifies the linkage.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Limitations
- Exclusion, not a positive finding. If a primary record ever documents the linkage, this exclusion must be revisited.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-05
-
[7]National Archives, Researching Asbestos aboard US Naval Vessel up through 1961 [other_primary]
- Locator
- Sections listing RG 19 Entry P 12 and RG 38 Entry P 1-E
- Finding type
- historical_record
- Finding
- The National Archives identifies Patrol Craft General Information Books (Record Group 19, Entry P 12, 1902-1955) and Patrol Craft Material Inspection Reports and Related Documentation (Record Group 38, Entry P 1-E, 1940-1978) as relevant Navy record series for patrol-craft research. These are archival search leads only; no PC-523 item-level record was retrieved.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- class_or_era
- Accessed
- 2026-10-06
- Study period
- 1902-1978
- Population
- U.S. Navy patrol craft records
- Limitations
- The NARA guide describes record series, not PC-523, asbestos aboard any hull, or any individual's exposure. Leads only.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-06
-
[8]Bounded official-source search for USS PC-523, 2026-10-06; see search_ledger entries [other_primary]
- Locator
- Search ledger sl-uss-pc-523-pc523-01 through sl-uss-pc-523-pc523-06
- Finding type
- asbestos_application
- Finding
- No ship-specific asbestos survey, abatement record, Navy disclosure, or qualifying asbestos litigation record was located for USS PC-523. CourtListener sweep complete (6 queries via authenticated helper): exact-name opinion leg clean (13 collisions, 0 vessel mentions); both asbestos variants zero; docket/hull legs overflowed as pure collision noise. Asbestos documentation for this hull remains unknown. Because the hull number falls in a never-built block, there is no completed hull for ship-specific asbestos findings to attach to.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Limitations
- Bounded search result, not proof that no record exists anywhere. NARA item-level files not examined. Overflow legs (1,351 / 7,039 / 32,997 hits) classified as collisions by sampling; individual review of all hits not feasible.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-523-pc523-07