Evidence
13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).
-
[1]research packet 923-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: MISMATCH
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Evidence ID
- uss-sc-677-sc677-pkt-923-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-677 (ex-PC-677) - timeline, specifications, commanding officer, call sign (live verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/150677.htm header block, specifications block, commanding-officer table
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 27 February 1942 by W.A. Robinson Inc., Ipswich, MA; launched 27 July 1942; commissioned PC-677, 19 August 1942; reclassified SC-677 in April 1943; visited Auckland, New Zealand 15-26 October 1944; struck from the Naval Register 8 January 1946; 'Scrapped of 1 March 1946' [sic - likely 'as of']. Specifications: displacement 148 t; length 110'10"; beam 17'; draft 6'6"; speed 15.6 kts; complement 28; armament one 40mm mount, two .50 cal. machine guns, two depth charge projector 'Y Guns'; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Call sign Nan-William-Victor-Xray. Commanding officer LTJG F. M. Dunlap, USNR (1945). Page states 'There is no DANFS history available for SC-677.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- W.A. Robinson construction trades (1942); crew (1942-45/46); disposal workforce (1946)
- Limitations
- Ship-specific history only; no asbestos or material content. NavSource is a volunteer secondary compilation - its milestones generally track NVR/builder records but conflicts exist on the reclassification date (April 1943 vs navypedia's September 1942 pattern) and delivery date (19 vs 29 August 1942); both carried in gaps. No decommissioning date, disposal location, or buyer given. Sole illustration is a Friedman 'U.S. Small Combatants' line drawing - no photographs. Its 'no DANFS history available for SC-677' note is wrong in the strict sense: a brief official DANFS block entry exists (see ev-02) - what NavSource means is no full DANFS narrative.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-01
-
[3]NHHC DANFS, 'SC-601 - SC-700' block entry page, SC-677 entry (Wayback Machine capture of 2025-12-09; live NHHC URL returned HTTP 404 on 2026-10-03 - cited as archived per citation-hygiene rule) [nhhc_danfs]
- Locator
- DANFS 'SC-601 - SC-700' page, SC-677 entry (Wayback capture 2025-12-09)
- Finding type
- vessel_history
- Finding
- NHHC's official DANFS block entry for this hull reads in full: 'SC-677 - Built at W.A. Robinson Inc., Ipswich, Mass. Keel laid 2/27/42. Launched 7/27/42. Commissioned 8/19/42. Disposed of 3/1/46.' This is the official registry-style confirmation of builder, construction milestones, and disposal - and it corrects NavSource's 'no DANFS history available' note: a brief DANFS block entry exists even though no full DANFS narrative was written. The NHHC entry gives disposal ('Disposed of 3/1/46') without 'scrapped' wording, location, or buyer.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- W.A. Robinson construction trades (1942); crew (1942-45/46); disposal workforce (1946)
- Limitations
- Official but minimal: the block entry carries only builder and four milestone dates - no service narrative, no specifications, no PC-677 commissioning designation or reclassification date, no asbestos or material content. Live page 404s; archived capture used and labeled archived.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-02
-
[4]National Archives, Special List 44 (Logbooks of U.S. Navy Ships and Stations), index by ship number, row 5275 (live PDF verified 2026-10-03) [other_primary]
- Locator
- Special List 44 'By Ship Number' PDF, row 5275 (SC-677)
- Finding type
- historical_record
- Finding
- NARA's official logbook index (Special List 44) lists this hull - 'SC-677 | 8/19/1942 | 12/17/1945' - documenting logbook coverage spanning commissioning (19 August 1942) through 17 December 1945. The end date brackets her decommissioning to late December 1945, consistent with striking on 8 January 1946 and disposal 1 March 1946.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-08-19 to 1945-12-17
- Population
- SC-677 service-era crew (1942-45), not individually identified
- Limitations
- Index row only: establishes that logbooks for this hull exist at NARA covering the stated span - it does not describe their contents, operations, materials, or any asbestos information, and it does not itself give a decommissioning date (the logbook end is a bracket, not a formal date). Underlying logbooks unreviewed - they are the principal archival lead for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-03
-
[5]uboat.net Allied Warships: USS SC-677 (SC-677) data block; and USS Catfish (SS-339) notable-events page (ship/3085.html) extracted from her patrol reports [other_primary]
- Locator
- uboat.net ship/8894.html data block; ship/3085.html 'Notable events' entry dated 5 Aug 1945
- Finding type
- vessel_history
- Finding
- uboat.net data block corroborates: built by W.A. Robinson Inc. (Ipswich, Massachusetts, U.S.A.); ordered 24 December 1941; laid down 27 February 1942; launched 27 July 1942; commissioned 19 August 1942. The USS Catfish (SS-339) events page - explicitly 'extracted from her patrol reports' - records: '5 Aug 1945 USS Catfish (Lt.Cdr. W.A. Overton, USNR) arrived at Guam. She was escorted in by USS SC 677.' This places this hull at Guam performing harbor-escort duty for a returning fleet submarine in the final days of the Pacific war.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- SC-677 crew at Guam (1945)
- Limitations
- uboat.net is a researcher-compiled secondary database, but the Catfish event derives from the submarine's patrol reports (primary underlying record). Documents presence and escort duty at Guam on 5 August 1945 only - no asbestos or material content, and no information on the vessel's assignment chain or earlier Pacific stations.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-04
-
[6]OpNav, 'Composition of Task Forces,' 5 May 1943 (F-35 Operational Intelligence distribution; White House Map Room copy) - Franklin D. Roosevelt Library, President's Map Room Papers, MR 404 series, scan mr0663.pdf (declassified) [other_primary]
- Locator
- mr0663.pdf, Caribbean section ('TF 01 - U.S. NAVY CARIB'), group 05.3.3 listing; cover page 'COMPOSITION OF TASK FORCES May 5, 1943', F-35 distribution, declassification stamp
- Finding type
- historical_record
- Finding
- A declassified wartime task-organization report names this hull by number: the 5 May 1943 'Composition of Task Forces' (OpNav, distributed to the White House Map Room) lists SC-677 in group 05.3.3 together with SC-667 and SC-1039, within the U.S. Navy Caribbean force listing amid the NOB Trinidad and Curacao-Aruba sector organizations - a documented Caribbean Sea Frontier assignment for this hull as of May 1943.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-05-05 (report date)
- Population
- SC-677 crew, Caribbean Sea Frontier (1943)
- Limitations
- Primary-source organization listing only: establishes the hull's Caribbean assignment as of the report date, not the duration of that assignment or any operations. Scan OCR is degraded; the SC-677 line entry is legible and consistent across the document's summary and detail sections, but neighboring entries are partially garbled and the exact subgroup designation reads as '05.3.3'. No asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-05
-
[7]Naval Marine Archive 'Sub Chasers Built During WWII' build table (shipbuildinghistory-derived); navypedia SC-497 class table (navypedia.org/ships/usa/us_sc_sc.htm); shipbuildinghistory W.A. Robinson yard list (intermittent HTTP 500 this session - index snippet corroborated) [other_primary]
- Locator
- navalmarinearchive.com pc2.html row 'SC 677'; navypedia us_sc_sc.htm row 'PC677'; shipbuildinghistory.njscuba.net robinsonma row 'SC-677'
- Finding type
- vessel_history
- Finding
- Independent build-list corroboration: 'SC 677 | W. A. Robinson | Ipswich MA | 148 | 110 | 19-Aug-42 | Disposed of 1946' (Naval Marine Archive table, listing 148 light-displacement tons, 110-ft length); navypedia 'PC677, 9.1942- SC677 | W. A. Robinson, Ipswich | laid down 2.1942 | launched 27.7.1942 | comm. 8.1942 | disposed 3.1946'; shipbuildinghistory yard list gives the same hull with a 29 August 1942 entry date and 'disposed-of 1946'.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- W.A. Robinson construction trades (1942)
- Limitations
- Secondary build-list compilations, consistent with each other and with NavSource/uboat.net on builder and milestones. Two conflicts carried in gaps: navypedia's '9.1942' reclassification pattern vs NavSource's April 1943, and the 19 vs 29 August 1942 commission/delivery variant. 'Disposed of 1946'/'disposed 3.1946' add no location or buyer. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-06
-
[8]Era inference built on: NavSource SC-677 specifications (GM 8-268A diesels, no steam plant); splinterfleet.org class facts (diesel powerplants, wooden hull); GAO HRD-80-2 Navy-wide asbestos-era documentation (see ev-08) [other_primary]
- Locator
- NavSource specifications block; splinterfleet.org facts-and-specifications page; GAO HRD-80-2 product page
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel submarine chaser built 1942 sits inside the Navy's documented asbestos-use era, but at the low end of shipboard asbestos relevance: she had no boilers, no steam lines, and no turbine lagging. Era-standard applications aboard small combatants of the period were engine and exhaust/muffler insulation, gaskets, valve packing, and electrical insulation in the machinery spaces. Asbestos relevance is materially lower than for steam-powered steel vessels of the same era.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- W.A. Robinson construction trades (1942); crew (1942-45); disposal workforce (1946)
- Limitations
- Class/era inference only - no hull-specific insulation schedule, material list, work package, or survey located for SC-677, and her small private builder (W.A. Robinson) generated far less documentation than naval shipyards. Names era-standard applications, not confirmed installed materials. No quantity. No manufacturer attribution possible for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO documented that the Navy used asbestos insulation extensively aboard ships and did not begin substituting alternative insulation materials until the early 1970s - spanning this hull's entire construction (1942) and service era (1942-46).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull - and for a wooden diesel subchaser the inference is weaker than for steam vessels. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403 - standing access defect since Batch 01, confirmed this session per Batch-98 finding); content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-08
-
[10]splinterfleet.org (Theodore R. Treadwell, wartime SC commanding officer and author of 'Splinter Fleet: The Wooden Subchasers of World War II,' Naval Institute Press) - Facts and Specifications and Hulls Still Afloat pages [other_primary]
- Locator
- splinterfleet.org/facts-and-specifications table (WWII SC-497 column) and /hulls-still-afloat survivor table
- Finding type
- historical_record
- Finding
- Class context from the specialist class reference: 438 WWII SC-497-class subchasers built at roughly fifty mostly family-owned boatyards; two diesel options (GM 8-268A straight-8 at 15.6 knots, or GM 16-184A 'pancake' at 21 knots - SC-677 carried the 8-268A per NavSource, the slower variant); wooden hull; smallest commissioned warships of the wartime Navy. The Hulls Still Afloat page catalogs the handful of surviving hulls - SC-677 is not among them, consistent with the 1946 scrapping.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- SC-class construction and service populations (1941-46)
- Limitations
- Class-level context, not hull-specific findings. Treadwell's figures conflict with NavSource ship-page values on displacement (98 vs 148 t) and complement (3+24 vs 28) - carried in gaps. Absence from the afloat list corroborates but does not itself prove scrapping. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-09
-
[11]Batch-8051 search ledger (this record): NavSource; NHHC DANFS archived block entry; NARA Special List 44 logbook index; uboat.net ship + Catfish patrol-report extract; FDR Map Room MR 404 task-force report; NARA catalog API; NVR (live, pre-1987 scope exclusion); navypedia + Naval Marine Archive + shipbuildinghistory build lists; splinterfleet.org; HyperWar ships-sc index; secondary web litigation sweep; CourtListener (opinions ran - collisions only; docket side blocked) [other_primary]
- Locator
- search_ledger rows sl-uss-sc-677-sc677-01 through -12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS SC-677 (or PC-677) was found in the public sources searched. CourtListener base opinion query '"SC-677"' (type=o) ran: 16 hits, ALL name collisions - Kentucky Supreme Court docket numbers (SC-000677/SC-677 series) and reporter-citation matches; none reference a vessel, and none are asbestos cases naming this hull. The secondary web litigation sweep likewise surfaced only reporter-citation collisions (Indian 'SCC OnLine SC 677' citations); no law-firm ship-listicle coverage located. CAVEAT: the CourtListener docket query (type=r) could not be run - the fleet-wide pacing budget (~58/hr shared) was spent on all attempts (helper exit 2) - logged as blocked in search_ledger, not as a negative result.
- 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 - and the docket-side repository search is a genuine open gap (paced out, not run; opinions side ran and returned only collisions). Deck logs, war diaries, and builder work records for this hull are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-10
-
[12]Designation cross-check: NavSource SC-677 page ('ex-PC-677'; commissioned PC-677, reclassified SC-677 April 1943); navypedia SC table ('PC677, 9.1942- SC677'); splinterfleet + indicatorloops class context (SC hulls ordered into PC numbering); HyperWar ships-sc index (PC/SC blocks) [other_primary]
- Locator
- NavSource header 'ex-PC-677' and timeline; navypedia row label; HyperWar ships-sc.html SC-497 class index
- Finding type
- historical_record
- Finding
- CORRECTION of a scope ambiguity: 'PC-677' never designated a PC-461-class steel patrol craft. This hull was commissioned under the patrol-craft number PC-677 on 19 August 1942 (SC-class hulls were ordered into the PC numbering series) and reclassified SC-677 in April 1943 per NavSource; the steel PC-461-class numbering skips the blocks occupied by SC hulls, so no steel patrol vessel ever bore PC-677. Any source treating 'PC-677' as a distinct patrol-craft vessel conflates this wooden chaser's temporary designation with a different class.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943 (designation window)
- Limitations
- Corrects a designation-reading error, not a material claim. The exact reclassification date conflicts across sources (April 1943 NavSource vs the September 1942 pattern navypedia applies class-wide) - NavSource carried; both noted in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-11
-
[13]NARA catalog API search (catalog.archives.gov/proxy/records/search) for SC-677 records; WWII war-diary series presence check [other_primary]
- Locator
- catalog.archives.gov/proxy/records/search q='SC-677' (10/3/26); NAID 78322198 'USS SC-684 - War Diary, 4/1-30/43' (series exemplar)
- Finding type
- historical_record
- Finding
- NARA catalog full-text search for 'SC-677' surfaces no hull-specific record - tokenized results are dominated by unrelated material (Signal Corps photo 111-SC-677, morning-report rolls). The WWII war-diary series demonstrably contains SC-class records (sister boat SC-684's April 1943 war diary is cataloged at NAID 78322198), so this hull's war diaries and RG 24 deck logs are probable but unindexed archival leads.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- Archival lead only: catalog search is token-sensitive ('SC'/'677' split) and small-craft deck logs are sparsely digitized - a null surface result does not prove absence of holdings. SC-684's NAID evidences the series, not this hull's presence in it. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-677-sc677-12