Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
-
[1]DANFS, 'SC-601 - SC-700' compiled entry, Naval History and Heritage Command (verified live 2026-10-03) [nhhc_danfs]
- Locator
- SC-630 paragraph within compiled DANFS 'SC-601 - SC-700' page
- Finding type
- vessel_history
- Finding
- DANFS records SC-630 verbatim: 'Built at Mathis Yacht Building Co., Camden, N.J. Keel laid 12/22/41. Launched 4/18/42. Commissioned 8/6/42. Change from SC-630 to SCC-630 on 8/20/45. Transferred to Maritime Commission 3/9/48.' The authoritative milestone record for this hull.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1948
- Limitations
- Terse milestone record only - DANFS carries no operational narrative for this hull, no decommissioning or stricken date, and no asbestos or material content. Contains no exposure information whatsoever.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-01
-
[2]NavSource Online: Submarine Chaser Photo Archive, 'SCC-630 ex-SC-630 ex-PC-630' page (navsource.net, verified live 2026-10-03; navsource.org is dead - .net domain used per batch citation rules) [other_primary]
- Locator
- SC-630 page header 'ex-PC-630', milestone block, specifications block, commanding-officer table
- Finding type
- vessel_history
- Finding
- NavSource records: laid down 1941-12-22 by Mathis Yacht Building Co., Camden NJ; launched 1942-04-18; commissioned USS PC-630 1942-08-06; reclassified SC-630 in April 1943; reclassified Control Submarine Chaser SCC-630 1945-08-20; transferred to Maritime Commission 1948-03-09; fate unknown. Specifications: 148 t, 110'10" x 17' x 6'6", 21 kts, complement 28, one 40mm gun mount + two .50 cal MG + two Y-Gun DCP + two DCT, two 1,540 bhp General Motors (Electro-Motive Div.) 16-184A diesel engines on two shafts. Call sign Nan-William-Mike-William. Commanding officer listed: ENS W. R. Thoits, USNR (1945).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1948
- Population
- Crew of ~28 (complement figure); shipyard trades at Mathis yard (1941-42)
- Limitations
- NavSource is a volunteer photographic archive, not an official repository, but its SC milestone/specification data tracks DANFS and NVR conventions and is the most detailed ship-specific record located. The PC-630 commissioning designation it records is administrative, not evidence of a PC-461-class vessel (see aliases and gaps). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-02
-
[3]Naval Marine Archive, 'Mathis Yacht Building Co. / John Trumpy & Sons, Camden and Gloucester City, NJ' builder's table (verified live 2026-10-03) [other_primary]
- Locator
- Builder's table row '257 | SC 630 | US Navy | Sub Chaser | 148d | 110 | 6-Aug-42 | To NDRF 1948'
- Finding type
- vessel_history
- Finding
- The yard's hull table lists Mathis hull no. 257 as 'SC 630,' owner US Navy, type Sub Chaser, 148 t, 110 ft, delivery 6-Aug-42, disposition 'To NDRF 1948' - independently corroborating the build yard, delivery date, and 1948 government-surplus disposal (NDRF = Maritime Commission custody). Sister Mathis hulls in the same block (SC-631 through SC-635 and the SC-1023/1067 series) document the yard's wartime subchaser program.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1948
- Population
- Mathis/Trumpy yard workforce, Gloucester City/Camden NJ (1941-42)
- Limitations
- The NMA table files hull 257 under its 'Built in Gloucester City by John Trumpy & Sons' heading while DANFS and NavSource both name 'Mathis Yacht Building Co., Camden' - a yard-identity transition nuance (Mathis yacht division moved Camden -> Gloucester City and became John Trumpy & Sons mid-war), not a different physical yard location dispute; both names are carried in builder fields and gaps. NMA is a secondary compilation; delivery date corroborates, does not supersede, DANFS.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-03
-
[4]uboat.net Allied Warships, 'USS SC-630 (SC-630)' page (verified live 2026-10-03) [other_primary]
- Locator
- Ship page 8847, data table
- Finding type
- vessel_history
- Finding
- uboat.net records SC-630 as an SC-497-class submarine chaser built by Mathis Yacht Building Co. (Camden, NJ): ordered 1941-07-30, laid down 1941-12-22, launched 1942-04-18, commissioned 1942-06-08. The order date (30 Jul 1941, pre-Pearl Harbor) is the only located order-date source.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1942
- Limitations
- Secondary compilation. Its 'Commissioned 8 Jun 1942' conflicts with DANFS '8/6/42' and NMA delivery 6-Aug-42 - read as a day/month transposition of 6 Aug; DANFS controls the commission date and the uboat figure is carried only as a documented conflict in gaps. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-04
-
[5]Patrol Craft Sailors Association, 'WWII SCs' page - SC design history, conversion programs, war record (verified live 2026-10-03) [other_primary]
- Locator
- Sections 'US NAVY CONVERSIONS (84)' -> 'Beach Control Craft (SCC 70)' and 'SC WORLD WAR II SERVICE'
- Finding type
- vessel_history
- Finding
- PCSA documents the 110-foot wood-hull SC as an offshore-patrol/ASW craft operated in every combat theater, and the Beach Control Craft (SCC) conversion of roughly 70 SCs: the conversion replaced the forward 40mm gun with a 20mm cannon, added two .50-caliber machine guns and additional radio equipment, and modified crew quarters for extra beach-landing personnel. SCCs operated in the Asiatic-Pacific theater in amphibious landings ('MacArthur's Navy') and were being trained for the invasion of Japan when hostilities ended.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- SC/SCC crews, WWII (class context)
- Limitations
- Veterans-association history page - class/program context only. It does not name SC-630 and cannot establish where this hull served or what its SCC conversion involved aboard this specific vessel; the SCC mission description is type-level. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-05
-
[6]Splinterfleet.org (Theodore R. Treadwell's WWII subchaser site), Photos page - 'SC 630 rescuing a downed pilot' (verified live 2026-10-03); same photograph captioned 'Rescuing downed Airman / National Archives photo' on NavSource [other_primary]
- Locator
- splinterfleet.org/photos image sc630.jpg; NavSource SC-630 photo table (1215063001.jpg)
- Finding type
- historical_record
- Finding
- A National Archives photograph of SC-630 rescuing a downed airman/pilot survives and is published by both NavSource (credited to T. R. Treadwell, Splinter Fleet) and splinterfleet.org - documentary evidence of at least one air-sea-rescue event in this hull's wartime record.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- WWII (undated in located copies)
- Population
- SC-630 crew at the rescue event; the rescued airman
- Limitations
- The published copies carry no date, location, or NARA identifier, so the theater (Atlantic ASW/rescue vs. Pacific) cannot be established from located metadata; the underlying NARA negative is the open archival lead (catalog.archives.gov is JS-rendered and was not directly searchable this session). Photo records an event, not conditions aboard; no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-06
-
[7]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) (DOI verified live 2026-10-03) [other_primary]
- Locator
- AJIM 11(3):359-373, abstract and article
- 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 under which this wooden subchaser was mass-produced at a small yacht yard - and that wartime demand drove unprecedented asbestos utilization aboard U.S. hulls.
- 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 (class context)
- Limitations
- Program/era-level scholarly documentation of asbestos use in WWII shipbuilding generally; does not name this vessel, class, or builder and does not establish that asbestos was or remains aboard this hull, nor quantity, location, condition, individual exposure, or causation. Much of the documented shipyard exposure literature concerns larger combatant and merchant steam vessels, a materially different plant than this diesel subchaser.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-07
-
[8]GAO HRD-80-2, report on Navy asbestos use, removal costs, and compensation programs (product page verified live 2026-10-03) [gao]
- Locator
- GAO product page HRD-80-2 (published 1979-10-18, released 1979-10-22), Highlights section
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's use of asbestos in ships, the cost of removing it, and compensation programs: the Navy's 1975 policy was to remove/replace only damaged or repair-driven insulation, modified in 1979 to selective replacement in high-maintenance areas - program-level confirmation that asbestos insulation was standard aboard U.S. naval vessels of the era encompassing this hull's construction.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 report; reflects policies covering the WWII-built fleet
- Population
- Navy shipyard workers (program context)
- Limitations
- Program-level report: fieldwork was conducted at Long Beach and Norfolk Naval Shipyards and concerns primarily larger vessels; it does not name this hull, the SC-497 class, or the Mathis yard, and postdates the hull's 1948 disposal. Does not establish asbestos presence, quantity, or exposure aboard this vessel.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-08
-
[9]Batch-8005 search ledger (this record): DANFS SC-601-SC-700; NavSource SC-630; uboat.net ship 8847; NMA Mathis/Trumpy builder's table; splinterfleet.org; PCSA; HyperWar USN-ships SC index; NVR; Wikipedia SC-497-class list (lead only); CourtListener (see ledger for status) [other_primary]
- Locator
- search_ledger rows sl-uss-sc-630-sc630-01 through sl-uss-sc-630-sc630-11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record, or docketed case naming SC-630/SCC-630/PC-630 was found in the public sources searched (see search_ledger). No asbestos-related claim was located naming the Mathis Yacht Building/John Trumpy yard outside excluded law-firm marketing listicles.
- 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 - a 1942 hull of this type plausibly carried era-standard asbestos-containing consumables (gaskets, packing, exhaust lagging). Does not establish that asbestos is or is not present, nor establish or defeat any exposure or legal-eligibility claim.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-630-sc630-09