Evidence
14 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-14).
-
[1]research packet 922-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: PHANTOM
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-671-pc671-pkt-922-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-671 (ex-PC-671) - designation timeline, specifications, commanding officer, photograph (verified live, HTTP 200) [other_primary]
- Locator
- NavSource 12/150671.htm header block, specifications block, CO table, and 'History Addendum'
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 17 November 1941 as PC-671 by Inland Waterways, Inc., Duluth, MN; launched 8 August 1942; commissioned 19 October 1942; reclassified SC-671 in April 1943; decommissioned 6 April 1946 at Pearl Harbor, HI; struck from the Naval Register 8 May 1946; sold 11 December 1946; fate unknown. Specifications: 148 t.; 110'10"; 17' beam; 6'6" draft; 21 kts.; complement 28; one 40mm mount, two .50 cal. machine guns, two depth-charge 'Y' guns, two depth-charge tracks; two 1,540bhp General Motors (Electro-Motive Div.) 16-184A diesels, two shafts. Call sign Nan-William-Uncle-Zebra. Commanding officer listed: LTJG J. R. A. Paulson, USNR, 1945. Single photo of the hull at Pearl Harbor c.1946 (Hugh Hudson collection). Page states explicitly: 'There is no DANFS history available for SC-671.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- Inland Waterways construction trades (1941-42); crew (1942-46); Pearl Harbor inactivation population (Dec 1945-Apr 1946)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track official records and are corroborated here by NARA muster-roll coverage, the yard delivery table, and the CTG 95.4 war diary, but no underlying document is cited per date. Contains no asbestos content. 'Fate unknown' means only that disposal details after the 1946 sale are undocumented.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-01
-
[3]U.S. Coast Guard Historian's Office-derived Record of Movement card for SC-671, published verbatim as the NavSource 'History Addendum' (ROM card is the standard USCG vessel-movement record) [other_primary]
- Locator
- NavSource 12/150671.htm, 'History Addendum' (USCG Record of Movement card transcription)
- Finding type
- vessel_history
- Finding
- Movement record for this hull: at Ketchikan, Alaska on 5 July 1944, departed to relieve USS YP-251 in the 'Cape Fox Area' and proceed Pleasant Island, Alaska; remained in Alaskan waters until December 1944; reported at Puget Island on the 21st; at Pearl Harbor 7 March 1945; departed Pearl Harbor 5 July 1945; reported at Majuro Atoll 13 July 1945; arrived Okinawa 16 August 1945; at Guam 15 November 1945; visited Eniwetok thereafter; at Kwajalein 15 December 1945, departed for Pearl Harbor the following day; arrived Pearl Harbor 27 December 1945; decommissioned there 6 April 1946; sold 11 December 1946. The addendum notes: 'There is no indication of when her Coast Guard crew reported aboard or were discharged.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1946
- Population
- Crew - USCG-manned for at least part of Alaska service (dates undocumented), Navy crew documented 1944-46
- Limitations
- Station-reporting record: dates are when the vessel was reported at each station, which can lag or conflict with actual events - the Majuro 13 July report conflicts with the documented Guam escort of USS Hackleback on 12 July (see gaps). Coast Guard manning is implied by the record's existence in USCG Historian's Office files but transition dates are undocumented; the 1944-46 Navy radarman in ev-07 bounds the Navy-crewed period. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-02
-
[4]uboat.net Allied Warships entry, USS SC-671 (SC-671) - construction data and USS Hackleback (SS-295) patrol-report event naming SC-671 as escort [other_primary]
- Locator
- uboat.net ship/8888.html warship data table and 'Notable events' section
- Finding type
- vessel_history
- Finding
- Construction data: built by Inland Waterways Inc., Duluth, MN; ordered 18 September 1941; laid down 17 November 1941; launched 8 August 1942; commissioned 19 October 1942; sold 11 December 1946. Patrol-report event: on 12 July 1945 at 0521K, USS Hackleback (SS-295) rendezvoused with her escort USS SC-671 (Lt.(jg) J.R. Paulson, USNR); they arrived at Guam around 1000K/12, ending Hackleback's second war patrol; Hackleback then refitted alongside USS Proteus (AS-19).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- Crew (July 1945 Guam escort duty)
- Limitations
- uboat.net is a respected secondary compilation; the escort event derives from Hackleback's war patrol report but is paraphrased here, and the 12 July Guam arrival conflicts with the ROM card's Majuro 13 July report (see gaps). Confirms NavSource's CO listing (Lt.(jg) Paulson). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-03
-
[5]NARA, RG 38 (Office of the Chief of Naval Operations), WWII War Diaries series: COMTASK-GROUP 95.4 War Diary, 1-31 August 1945 (NAID 77492214; micro serial 141843, serial 00740, dated 30 Aug 1945; 11 scanned pages read in full) [other_primary]
- Locator
- NARA catalog NAID 77492214, scanned pages 8-9 (17 and 21 August entries)
- Finding type
- historical_record
- Finding
- Primary operational record naming this hull. 17 August 1945: 'SC 671, AMc 97, AMc 98 and AMc 204 arrived from Guam and reported to CTG 95.4 for duty' (Buckner Bay, Okinawa). 21 August 1945: 'Zeal (AM 131), and SC 671 departed Buckner Bay to join Task Unit 95.4.4' - the force executing CTG 95.4 Operations Order No. 9-45 (the 'Skagway' East China Sea-Ryukyus minesweeping operation). The diary's support-vessel roster lists 'SC 645, 759, 1034, 1036'; SC-671 appears only in the daily-movement narrative.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- August 1945
- Population
- SC-671 crew attached to Minecraft Pacific (TG 95.4/TU 95.4.4), Aug 1945
- Limitations
- Ship-specific primary record of operational assignments only - no asbestos or material content, and it documents arrival/reporting dates rather than continuous presence. The diary predates standard declassification; content was read from the NARA-scanned microfilm pages (Fold3 partnership digitization).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-04
-
[6]NARA, RG 38, WWII War Diaries series: COMINDIV 17 (Commander Mine Division 17), 'Minesweeping Operation Kagoshima Kaiwan, Kyushu, Japan - Report of,' serial 066, dated 12 September 1945 (NAID 77631868; micro serial 156500; 9 scanned pages read in full) [other_primary]
- Locator
- NARA catalog NAID 77631868, report pp. 1-2 (task organization, protective-sweep narrative) and p. 4 (gear-interference discussion)
- Finding type
- historical_record
- Finding
- Official action report naming this hull as a minesweeping participant. 'U.S.S. SC-671' is listed among the SWEEPERS (alongside STRIVE AM-117, PIONEER AM-105, STAFF AM-114, SPEED AM-116, STEADY AM-118, SUSTAIN AM-119) for the 2-9 September 1945 clearance of Kagoshima Kaiwan. The report states that in the protected clearance sweeps the formation steamed in port and starboard echelons 'with the SC-671 sweeping to a depth of 20 feet ahead of the leading AM, so as to provide protection against shallow mines,' and later notes the SC-671 'sweeping 800 to 900 yards ahead' - the shallow-draft wooden chaser used as a pathfinder ahead of the deeper steel sweepers, a role the command preferred 'to stake everything on a Sonar contact' alternative. The unit swept 166 mines (plus floaters).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- September 1945
- Population
- SC-671 crew during Kagoshima Kaiwan minesweeping, 2-9 Sep 1945
- Limitations
- Ship-specific primary record of the operation - no asbestos or material content. Confirms the P207-11 Kagoshima campaign participation credited in the secondary awards compilation (ev-08). Read from NARA-scanned microfilm pages.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-05
-
[7]NARA, RG 24 (Bureau of Naval Personnel), 'Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities, 1939-1949': file unit 'SC-671, 10/19/42-4/6/46' (NAID 192205438; 224 scanned images, unrestricted) [other_primary]
- Locator
- NARA catalog NAID 192205438 (series A1 135; Ancestry partnership digitization; also on microfilm Roll 6793)
- Finding type
- historical_record
- Finding
- Ship-specific crew record: the complete muster rolls of SC-671 are digitized and publicly accessible - 224 pages covering 19 October 1942 (commissioning) through 6 April 1946 (decommissioning), naming every officer and enlisted man aboard quarterly across the hull's entire service life. Coverage end date independently corroborates the 6 April 1946 decommissioning given by NavSource.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- All SC-671 officers and enlisted, 1942-46
- Limitations
- Archival lead: existence and coverage verified in the catalog; the 224 scanned pages were not transcribed or individually read, so named-crew contents beyond the coverage dates are unverified. Muster rolls document who was aboard, not exposure or duties. The prompt-cited NARA log coverage ending 6/30/1945 could not be reproduced - this verified unit runs 10/19/42-4/6/46 (see report).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-06
-
[8]Library of Congress, Veterans History Project: Michael Kin Collection (AFC/2001/001/96670) - service summary plus full 2014 interview transcript [museum_official]
- Locator
- LOC item AFC/2001/001/96670 service summary and transcript (interview of 9/26/2014)
- Finding type
- historical_record
- Finding
- An official archive documents a named crewman of this hull: Michael Kin, U.S. Navy, Radarman Third Class, service unit 'USS SC-671 (Submarine Chaser),' Pacific Theater, dates of service 1944-1946. In the interview Kin recalls reaching the ship via PT school late in the war ('I caught the tail end'), that 'they were in the process of going to convert that ship... from a sub chaser to a mine sweep,' that she was 'an old wooden hull, only drew six feet of water,' and that 'we were supposed to be the first ship in to clear the channel if we went into Japan' - independently consistent with her documented Aug-Sep 1945 pathfinder-minesweeper employment.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1946
- Population
- Michael Kin (RM3c) and SC-671 crew, 1944-46
- Limitations
- Oral history recorded ~70 years after service: the LOC record verifies the veteran and his stated unit, but transcript details are recollection - it contains demonstrable slips (e.g., 'commissioned in 1918') and the conversion remark is postwar-informed, not a contemporaneous record. Vessel-history context only; no exposure or asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-07
-
[9]Commercial compilation of the official WWII operation/engagement credit lists (operation codes verified against the DANFS 'Area Campaign Medals & Battle Stars' appendix, ibiblio HyperWar): per-ship credit attribution for SC-671 [other_primary]
- Locator
- officialmilitaryribbons.com SC-497-to-SC-691 ship list, 'SC 671' entry; DANFS BattleStars appendix for operation codes
- Finding type
- historical_record
- Finding
- The compilation attributes three WWII operation/engagement credits to SC-671: P35, 3d Fleet operations against Japan (ship window 10-31 July 1945); P207-23, 'Skagway' minesweeping operation, East China Sea-Ryukyus area (ship window 22-24 August 1945); and P207-11, Kagoshima, Kyushu-Korea area (ship window 3-7 September 1945). The Skagway and Kagoshima employment is independently confirmed by primary NARA documents (ev-04, ev-05); P35 corresponds to her July 1945 Guam-area escort duty (ev-03).
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- July-September 1945
- Population
- SC-671 crew during credited operations, Jul-Sep 1945
- Limitations
- Partial verification: the attributing source is a commercial vendor's transcription of the official CNO campaign-credit lists - the three operation codes are verified official (DANFS appendix), and two of the three participations are confirmed by primary NARA records, but the per-hull attribution itself awaits confirmation in the NHHC/CNO ship-credit list. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-08
-
[10]Naval Marine Archive shipbuilding-data compilation (ShipbuildingHistory-derived), 'Inland Waterways (shipbuilder), Duluth MN' - yard history and complete build table [other_primary]
- Locator
- navalmarinearchive.com Inland Waterways yard page, build table
- Finding type
- vessel_history
- Finding
- Builder record for this hull: the Inland Waterways yard at 1000 Minnesota Avenue, Duluth (Park Point, immediately north of the Coast Guard station) 'was developed to build sub chasers, but only built four before folding': SC-670 (delivered 2-Aug-42, to USCG 1945 as Air Grayleg WAVR-425), SC-671 (delivered 19-Oct-42), SC-1059 (delivered 27-Feb-43), and SC-1060 (delivered 24-Apr-43, to the USSR 1945 as BO-317). The table lists SC-671's disposition as 'To MARAD 1945.'
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- Inland Waterways construction trades (1941-43)
- Limitations
- Secondary compilation, not an official registry - delivery dates corroborate NavSource/uboat.net milestones, but the 'To MARAD 1945' disposition conflicts with the documented 11 December 1946 sale (see gaps); carried for builder context and the four-hull yard history. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-09
-
[11]Designation cross-check: NavSource designation line ('ex-PC-671'; 'Reclassified SC-671 in April 1943'); Inland Waterways build table (all four hulls delivered as SC-type submarine chasers); SC-497 class references [other_primary]
- Locator
- NavSource 12/150671.htm header and timeline; navalmarinearchive.com Inland Waterways build table
- Finding type
- historical_record
- Finding
- CORRECTION of a catalog-identity ambiguity: this hull was ordered/laid down under the PC series number PC-671 but was built to the 110-foot wooden SC-497-class submarine-chaser design and reclassified SC-671 in April 1943 - her builder delivered her (and all four yard hulls) as sub chasers. She was never a PC-461-class (173-foot steel) patrol craft; 'PC-671' and 'SC-671' are the same single hull, canonical identity SC-671.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1943
- Limitations
- Corrects designation confusion, not a material claim. The exact April 1943 reclassification date (day) is not stated in any located source - month-level only. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-10
-
[12]Era inference built on: NavSource/uboat.net construction and propulsion data (wooden hull, 2 x GM 16-184A diesels); SC-497 class reference data (110' wooden 'Splinter Fleet' type); GAO HRD-80-2 Navy asbestos-era documentation (see ev-12) [other_primary]
- Locator
- NavSource specifications block; uboat.net data table; SC-497 class general characteristics (secondary literature)
- Finding type
- asbestos_application
- Finding
- A 110-foot wooden-hulled submarine chaser built 1941-42 sits inside the Navy's documented asbestos-use era. Era-standard applications aboard a diesel-engined small combatant of this type and period were engine and exhaust lagging, gaskets, valve packing, and electrical insulation in the machinery space. She carried no steam plant - the boiler/turbine lagging pathway of larger combatants does not apply - and her hull was wood, not steel.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- Inland Waterways construction trades (1941-42); crew (1942-46); Pearl Harbor inactivation population (1945-46); any post-sale owners (1946-)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for SC-671. 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-671-pc671-11
-
[13]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 (1941-42) 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. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, confirmed 2026-10-03) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-12
-
[14]Batch-8045 search ledger (this record): NavSource (live); uboat.net; NARA catalog (muster rolls NAID 192205438, CTG 95.4 war diary NAID 77492214, COMINDIV 17 Kagoshima report NAID 77631868); Library of Congress VHP; awards-credit compilation; yard compilation; GAO product page; NHHC DANFS (404); NVR (no record); CourtListener (blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-671-pc671-01 through -13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, environmental record, or verified litigation naming SC-671 or PC-671 was found in the public sources searched. CAVEAT: CourtListener could not be queried before commit - every attempt returned the helper's fleet-pacing stand-down (shared ~58/hr budget momentarily spent); logged as blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced no qualifying case and no law-firm marketing naming this hull.
- 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 litigation repository search is a genuine open gap (blocked, not run). The digitized muster rolls (ev-06) and any RG 19 construction/repair records are open leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-671-pc671-13