Evidence
17 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-17).
-
[1]research packet 930-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-724-pc724-pkt-930-packet-md
-
[2]DANFS appendix, SC-701 through SC-800 (NHHC live page, verified 2026-10-03) [nhhc_danfs]
- Locator
- DANFS 'SC-701 - SC-800' appendix, SC-724 entry
- Finding type
- vessel_history
- Finding
- DANFS appendix record for this hull (verbatim): 'Built at Harbor Boat Building Co., Terminal Island, Calif. Keel laid 4/6/42. Launched 7/2/42. Commissioned 12/23/42. Transferred to Maritime Commission 12/16/46.' The entry appears as SC-724 in the SC-701-SC-800 submarine-chaser appendix; the appendix series carries the hull under its final SC designation without narrating the interim PC-724/SCC-724 designations.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- Harbor Boat Building construction trades (1942); crew (1942-46)
- Limitations
- Ship-specific milestones only; no asbestos or material content, no service narrative. The appendix entry does not state the PC-724 commissioning designation or the SCC-724 reclassification - those come from NavSource (ev-02). Decommissioning is not stated.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-01
-
[3]NavSource Online: Submarine Chaser Photo Archive, SCC-724 ex-SC-724 ex-PC-724 - designation timeline, specifications, disposal, merchant chain (live page verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/150724.htm header block, specifications block, commanding-officer table
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: 'SC-497 Class Submarine Chaser: Laid down 6 April 1942 by the Harbor Boat Building Co., Terminal Island, CA. Launched 2 July 1942. Commissioned PC-724, 23 December 1942. Reclassified SC-724 in April 1943. Reclassified as a Control Submarine Chaser, SCC-724 in August 1945. Struck from the Naval Register 25 February 1946. Transferred to the Maritime Commission 16 December 1946.' Merchant chain: acquired 1946 by Seymour Navigation Co., Ltd. of North Vancouver, B.C. and named Norqueen; thereafter Queen Charlotte Fisheries (1961), Cassiar Packing (1979), Ocean Fisheries (1985), Hendrika Mann (1987), Ocean Fisheries (1990), Larry W. Wilson (1991), Ocean Fisheries (1997), Donald Nordstrom (2001), Joseph Simon (2011); 'Fate unknown.' Spec block: 148 t.; 110'10" x 17' x 6'6"; 15.6 kts; complement 28; one 40mm mount, two .50 cal, two Y-gun depth-charge projectors, two depth-charge tracks; two 880bhp GM 8-268A diesels, Snow & Knobstedt single reduction gear, two shafts. Commanding officer table: LTJG J. C. Bruun, USNR, 1945. Page states 'There is no DANFS History currently available for SC-724' (i.e., no full narrative entry; the appendix line-item of ev-01 exists).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-2011
- Population
- Harbor Boat Building trades (1942); crew (1942-46); Canadian merchant crews (1946-c.2011)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates are corroborated here by the DANFS appendix (build dates, commissioning date, Maritime Commission transfer) and by primary NARA records (SC designation in use by Jul 1943; SC-724 in the Pacific Fleet org of May 1945). Contains no asbestos content. The designation sequence it documents (commissioned PC, reverted to SC, then SCC) is the basis for the class correction carried at ev-15.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-02
-
[4]uboat.net Allied Warships of WWII, USS SC-724 (SC-724) - class, builder, order and milestone dates (live page verified 2026-10-03) [other_primary]
- Locator
- uboat.net ship 8941 fact table
- Finding type
- vessel_history
- Finding
- Independent secondary corroboration: 'Submarine chaser of the SC-497 class. Pennant SC-724. Built by Harbor Boat Building Co. (Terminal Island, California, U.S.A.). Ordered 14 Feb 1942. Laid down 6 Apr 1942. Launched 2 Jul 1942. Commissioned 23 Dec 1942.' All dates match DANFS/NavSource; the order date (14 Feb 1942) is unique to this source.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- Harbor Boat Building trades (1942); crew (1942-46)
- Limitations
- Secondary reference work - used only for corroboration of builder/dates and the order date, which is not independently verified against a primary contract record. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-03
-
[5]NARA, RG 24 'Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities', file unit 'SC-724, 12/23/42-1/15/46' (NAID 192211483; Roll 6843; 249 images online) [other_primary]
- Locator
- NARA catalog file unit NAID 192211483 (RG 24, series NAID 594996); Roll 6843
- Finding type
- historical_record
- Finding
- Digitized muster rolls for this hull span its entire commissioned life, 23 December 1942 to 15 January 1946 - quarter-by-quarter crew rosters naming every officer and enlisted man aboard. The file-unit date range independently corroborates the 23 December 1942 commissioning date and shows the ship carried on its rolls through mid-January 1946, six weeks before the 25 February 1946 striking.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- all commissioned crew, 1942-12-23 through 1946-01-15
- Limitations
- Archival lead: the rolls establish who was aboard and when, not what materials were aboard. Individual muster-roll pages were not transcribed in this session (249 images). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-04
-
[6]NARA, RG 38 'World War II War Diaries, Other Operational Records and Histories', file unit 'USS SC-724 - War Diary, 7/1/43 to 10/31/43' (NAID 78272290; Roll A789; 128 images online) [other_primary]
- Locator
- NAID 78272290 images 0752-0753 (cover letter; log page 1 July 1943)
- Finding type
- vessel_history
- Finding
- Digitized ship's logs (forwarded under cover letter of 1 Dec 1943, CO Charles R. Moon, Jr.) covering July-October 1943. Page of Thursday 1 July 1943 (zone +9.5): moored starboard side to Berth K5, Navy Yard, Pearl Harbor; 0705 LST-487 underway; 0708 SC-724 underway out of Pearl Harbor 'followed by SC-726 & SC-734 respectively,' steaming in column searching the harbor entrance while awaiting the convoy; 0800 convoy formed, course 175 T, 9.5 knots; 1000-1040 fired 235 rounds of 20mm AA at a towed target, no personnel casualties; underway under COMSERVPAC Operation Order No. 57-43. Log approved by Lt. W. E. Dunlap, USNR, Commanding Officer. Documents the hull operating from Pearl Harbor in convoy-escort service by mid-1943, already designated SC-724.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943
- Population
- crew under Lt. W. E. Dunlap, mid-1943
- Limitations
- Primary deck log - contemporaneous operational record. Confirms the SC-724 designation in use by 1 July 1943 and places the ship at Pearl Harbor departing in escort of a convoy. Contains no material or asbestos content; CO succession (Dunlap -> Moon -> Wagner -> Bruun) is compiled across log/report signature blocks, not from a single roster source.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-05
-
[7]NARA, RG 38 'World War II War Diaries, Other Operational Records and Histories', file unit 'USS SC-724 - War Diary, 11/1-30/43' (NAID 78268611; Roll A785; 31 images online) [other_primary]
- Locator
- NAID 78268611 image 0565 (log page 2 November 1943)
- Finding type
- vessel_history
- Finding
- Digitized ship's log for November 1943 places the hull in the Solomon Islands: on Tuesday 2 November 1943 (zone -11) SC-724 lay moored alongside USS SC-726 at Buoy 'C', Tulagi Harbour; got underway for Purvis Bay via the Govane(?) Inlet, moored alongside YP-315 for fresh provisions, lay off repair ship USS Whitney (AD-4), and received Whitney estimators aboard 'to decide repairs needed' before returning to Tulagi Harbour, mooring alongside USS SC-733. Entries signed and approved by Charles R. Moon, Jr. (USN/USNR), commanding officer by this date. Documents Solomons-area operations and a repair-ship availability at Purvis Bay.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-11
- Population
- crew under Charles R. Moon, Jr., late 1943; USS Whitney repair estimators (contact)
- Limitations
- Primary deck log. The Purvis Bay/Whitney contact is a repair estimate visit recorded in the log - scope and content of any resulting work are not stated and no work package was located. No material or asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-06
-
[8]NARA, RG 38 WWII War Diaries, file unit 'USS SC-724 - AA Act Rep, 6/17/44, East of Guam, Marianas' (NAID 78512183; Roll A1041; 3 images online; serial 155-44, dated 29 June 1944) [other_primary]
- Locator
- NAID 78512183 images 0140-0142 (cover letter; AA report form)
- Finding type
- vessel_history
- Finding
- Primary anti-aircraft action report signed by CO F. E. Wagner: at 1749(K) on 17 June 1944, D.R. position 13-31N 146-47E (~165 miles east of Guam), operating as part of Task Group 53.16 (Capt. Grayson Carter, Tractor Group Three), SC-724 was attacked by 5-6 torpedo planes coming in very low on the starboard bow in a surprise attack. Ship's fire: three 20mm and two .50 cal under local control; 180 rounds 20mm and 40 rounds .50 cal expended (3% and 1% of service allowance); tracking-to-first-shot 60 seconds; first hits 1755. '20mm fire from this ship hit one plane as it passed close to and down the starboard side of this ship'; two planes 'definitely observed to be shot down by concentrated fire of Task Group,' a third possibly. Hits on ship: none; ship not strafed.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-06-17
- Population
- crew under F. E. Wagner, June 1944
- Limitations
- Primary action report - contemporaneous. Documents combat engagement and the ship's AA fit (20mm/.50 cal), not materials. No asbestos content. The report's 'flagship' name for TG 53.16 is partially legible ('U.S.S. Stambel(?)') and is not relied on.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-07
-
[9]NARA, RG 38 WWII War Diaries, file unit 'USS SC-724 - Report of Operations, Period 7/15-25/44 - Landings on Guam Island, Marianas' (NAID 78585327; Roll A1108; 8 images online; serial 177-44, dated 1 Aug 1944) [other_primary]
- Locator
- NAID 78585327 images 1038-1045 (cover letter; report; first and second endorsements)
- Finding type
- vessel_history
- Finding
- Primary action report signed by CO F. E. Wagner with endorsements by CTG 53.16 (G. B. Carter) and CTF 53 (R. L. Conolly): SC-724, attached to TG 53.16 (Tractor Group Three) of TF 53 (Southern Attack Force), left Eniwetok 15 July 1944 for the Guam landings. On W-day (21 July 1944) she served as Transfer Control Vessel for Beach Red One in the Asan area, embarked the TransDiv 8 beachmaster and control party, closed to ~2,000 yards firing 350 rounds of 40mm on the beach and cliffs, then directed landing-wave traffic at ~1,200-1,300 yards under desultory enemy mortar fire (shells landing within 50-75 yards) through 25 July, when released from control duty at 1040. First endorsement notes 'the excellent performance of duty of U.S.S. SC-724... especially when it is realized part of this duty was performed under fire'; the CO's report praises the subchaser type's suitability for control-vessel work.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-07-15 - 1944-07-25
- Population
- crew under F. E. Wagner; embarked TransDiv 8 control party, July 1944
- Limitations
- Primary action report - contemporaneous. Documents combat role and ammunition expenditure (40mm/20mm), not materials. No asbestos content. The beachmaster's surname is partially legible in the typescript ('Boelhauf/Boephauf'); not relied on.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-08
-
[10]NHHC, 'United States Pacific Fleet Organization, 1 May 1945' (Navy Department Library transcription; live page verified 2026-10-03) [other_primary]
- Locator
- Pacific Fleet org page, Service Squadron Two patrol-vessel listing (SC block)
- Finding type
- vessel_history
- Finding
- SC-724 appears in the 1 May 1945 Pacific Fleet organization under Service Force, Pacific Fleet, Service Squadron Two, in the patrol-vessel block, with commanding officer 'Lt. (jg) J. C. Bruun (USNR)' - matching the NavSource CO table entry for 1945.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-05-01
- Population
- crew under Lt. (jg) J. C. Bruun, May 1945
- Limitations
- Organizational listing only - places the hull and its CO inside ServRon Two as of 1 May 1945; left-column numerals in the table are uninterpreted here. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-09
-
[11]Major O. R. Lodge, USMC, 'The Recapture of Guam' (USMC Historical Division, 1954) - official Marine Corps historical monograph, Appendix IV force list (scanned on Internet Archive) [other_primary]
- Locator
- Appendix IV, patrol-vessels block of the Southern Troops and Landing Force ship list
- Finding type
- vessel_history
- Finding
- The official USMC history of the Guam operation lists SC-724 in Appendix IV ('Major Units - Southern Troops and Landing Force / United States Ships') under PATROL VESSELS alongside SC-504, SC-521, SC-607, SC-727, SC-1052, SC-1273, SC-1319, SC-1325, SC-1320, SC-1328 - corroborating this hull's participation in the July 1944 Guam campaign from the historical-division record.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944
- Population
- crew, July-August 1944
- Limitations
- Official-history force listing, not an operational record - corroborates presence, not the specific transfer-control role (documented by the action report, ev-08). OCR text of the archive.org scan is garbled in places; the SC-724 line item is legible. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-10
-
[12]NavSource, 110' Submarine Chaser (SC) photo index - SC-497 class summary (live page verified 2026-10-03) [other_primary]
- Locator
- NavSource SC index header narrative
- Finding type
- vessel_history
- Finding
- Class context: 'Five hundred eighty SC-497 Class wood-hulled, 110-foot Submarine Chasers (SC) were built during World War II, with 142 of these being used by our Allies under the Lend-Lease Program... The SC also played a role in Amphibious Landing, both in Europe and the Pacific. Seventy SCs were converted for use as Beach Control Craft and designated Control Submarine Chasers (SCC).' This hull's own action report (ev-08) shows it performing the SCC-type beach-control role at Guam in July 1944, a year before its formal August 1945 SCC reclassification.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- SC-497-class construction yard workers and crews, 1941-45
- Limitations
- Class-level summary - establishes hull material (wood) and the SCC conversion program, not this hull's specific outfit or conversion work content. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-11
-
[13]Era inference built on: NavSource spec block for this hull (two GM 8-268A diesels, no steam plant); NavSource class index (wood-hulled SC-497 class); DANFS/NavSource/uboat.net build dates (1942 construction, peak Navy asbestos-use era per GAO HRD-80-2) [other_primary]
- Locator
- NavSource 12/150724.htm spec block; NavSource 12/15idx.htm class summary; GAO HRD-80-2 product description
- Finding type
- asbestos_application
- Finding
- A wood-hulled, diesel-powered submarine chaser built in 1942 sits inside the Navy's documented asbestos-use era, but the application set aboard a craft of this type is narrow: era-standard uses aboard small diesel patrol craft were diesel-exhaust lagging, gaskets and valve packing in the engine/fuel systems, electrical insulation, and possibly fireproofing and adhesive compounds. The boiler/turbine lagging pathway of steam vessels does not apply (no steam plant), and the wooden hull removes the extensive fireproofing and bulkhead treatments of steel combatants.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-2011
- Population
- Harbor Boat Building trades (1942); crew (1942-46); repair-ship and base trades at availabilities (e.g., Purvis Bay 1943); Canadian merchant crews (1946-c.2011)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for this hull. Names era-standard applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-12
-
[14]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)
- 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. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, consistent with prior batches) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-13
-
[15]Bureau of Ships, 'USA - SC-1022 USS SC-1022 (Ex PC-1022) Booklet of General Plans (194X)' - sister SC-497-class hull, scanned on Internet Archive [other_primary]
- Locator
- archive.org item sc1022bogp194x
- Finding type
- historical_record
- Finding
- A digitized BuShips Booklet of General Plans exists for SC-1022 (ex-PC-1022), a sister SC-497-class hull that shares this hull's PC->SC designation pattern - 'Submarine Chaser (110ft), SC-497 Class, general dimensions & data, midship section.' Sister-hull general plans are the standard path to class-level construction detail; NARA RG 19 General Information Books remain the lead for hull-specific material specifications of SC-724 itself.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1945
- Population
- SC-497-class construction trades
- Limitations
- Sister-hull document, not this hull - class-level reference only. The 32 MB single-sheet scan was located but its content was not extracted for material callouts this session; whether it specifies insulation products is unverified. No asbestos claim is drawn from it.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-14
-
[16]Designation/class cross-check: NavSource hull page (SC-497 class; commissioned PC-724, reclassified SC-724 Apr 1943); NavSource SC index (wood-hulled class); DANFS appendix (carries hull under SC-724); uboat.net (SC-497 class) [other_primary]
- Locator
- NavSource 12/150724.htm designation timeline; NavSource 12/15idx.htm; DANFS SC-701-SC-800 appendix; uboat.net ship 8941
- Finding type
- historical_record
- Finding
- CORRECTION: this hull is a wood-hulled SC-497-class 110-foot submarine chaser, not a steel PC-461-class 173-foot patrol craft, despite carrying the designation PC-724 at commissioning (23 Dec 1942 - Apr 1943). The number block caused the misfile: hulls in the PC-6xx/7xx range commissioned in late 1942 included both steel PC-461-class craft and SC-497-class boats temporarily carrying PC designations; most reverted to SC numbers in April 1943. Class lists that file 'SC-724' under 173-ft PCs are following the brief commissioning designation, not the hull's actual construction class.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943 (designation window)
- Limitations
- Corrects a class-assignment ambiguity arising from the PC-724 designation window, not a material claim. All four checked sources (DANFS appendix, NavSource hull page and class index, uboat.net) independently agree on SC-497 class for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-15
-
[17]Batch-8098 search ledger (this record): DANFS appendix (NHHC live); NavSource hull page and class index; uboat.net; NARA catalog (muster roll, deck logs, action reports, photo item); NHHC Pacific Fleet organization; USMC 'Recapture of Guam' monograph; NVR; archive.org sister-hull plans; secondary web asbestos/litigation sweep; CourtListener (blocked); shipyards.json cross-check [other_primary]
- Locator
- search_ledger rows sl-uss-pc-724-pc724-01 through -15
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS PC-724 / SC-724 / SCC-724 / Norqueen was found in the public sources searched. The open-web sweep returned only name collisions (reporter cites, statute numbers, error codes) - not even law-firm marketing listicles claim this hull. CAVEAT: CourtListener could not be queried this session - the fleet-wide pacing budget was exhausted at every attempt (HTTP 429-adjacent pacing stop, not a server result); 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 litigation repository search is a genuine open gap (pacing-blocked, not run). Deck logs, muster rolls, Harbor Boat Building build records, Maritime Commission transfer documents, and the 65-year Canadian merchant career are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-724-pc724-16