Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 935-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-sc-758-sc758-pkt-935-packet-md
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[2]NavSource Online: Submarine Chaser Photo Archive, USCGC Air Loon (WAVR 436) ex-USS SC-758 (12/150758) - milestone timeline, specifications, commanding officers, ownership chain, final disposition [other_primary]
- Locator
- NavSource 12/150758.htm header timeline, specifications block, commanding officers table, ownership chain
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 6 August 1942 as PC-758 by Robinson Marine Construction Co., Benton Harbor, MI; reclassified SC-758 in April 1943; launched 28 July 1943; commissioned USS SC-758 14 September 1943; decommissioned 24 January 1946; transferred to the Coast Guard 25 January 1946; commissioned USCGC Air Loon (WAVR 436) 25 January 1946; struck from the Naval Register 7 February 1946; sold 19 January 1948 to Arthur V. Nelson of Seattle, WA for use as a fishing boat and renamed Loon. Ownership chain: Western Trading and Packing Co., Seattle (1950); Henry J. Emard dba Emard Packing Co., Seattle (1954); Whitney-Fidalgo Seafoods, Inc., Seattle (1968); Citicorp Leasing, Inc., Ketchikan, AK (1975); Joseph Ohlund, Homer, AK (1987). Sank in December 1992. Specs: dp. 93 t.; l. 110'10"; b. 17'; dr. 6'6"; s. 21 kts.; cpl. 28; propulsion two 1,540 bhp General Motors (EMD) 16-184A diesels, two shafts. Armament: one 40mm, one/two twin .50 cal MG, two/three K-guns, 14 depth charges with six single-release chocks, two Mk 20 Mousetrap rail sets. Call sign Nan-Xray-Peter-Jig. COs: LTJG John R. Kline USNR (14 Sep 1943), LTJG W. K. Coon USNR (1945).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1992
- Population
- Robinson Marine construction trades (1942-43); Navy crew (~28) 1943-46; USCG crew/caretakers 1946-48; commercial fishing crews 1948-92
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track official records but are not independently primary. Contains no asbestos content and no wartime operating-area narrative for this hull. Page states explicitly 'There is no DANFS history available for SC-758.' Verified live 2026-10-03 (navsource.net - the .org domain is dead).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-01
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[3]Flynn, HMC James T., Jr., USNR(ret), 'U.S. Coast Guard Patrol Craft - Major Classes, 100-feet to 150 feet in Length, 1915 to 2012' (USCG Historian-hosted photo essay, media.defense.gov): '110-foot World War II SC's - Air Class WAVR's' table and program narrative [other_primary]
- Locator
- Flynn Patrol Craft Pt. 2, '110-foot World War II SC's - Air Class WAVR's' table row WAVR 436 and preceding program narrative (PDF p. 8-9)
- Finding type
- vessel_history
- Finding
- Flynn's Air-class WAVR table carries this hull directly: 'WAVR 436 Air Loon ex. SC-758 24Jan1946 Sold 19Jan1948.' Program narrative for the Air class: surplus 110' wooden submarine chasers were transferred to the Coast Guard and converted to Air Rescue Vessels (WAVR), 'quickly stripped of their armament'; a postwar personnel shortage meant 'very few WAVR's actually entered full service, but instead were placed In Commission in Reserve with a two man skeleton crew of care takers, to await the time when they could be fully manned.' Class line: displ. 134 t. fl, dim. 110'10" x 17' x 6.5', 2 diesels 1,540 (or 800) hp, 2 screws, 21 (or 15.6) kts, cpl. 3 off + 25 enl, armament removed in CG service.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1946-1948
- Population
- USCG crew or caretakers, 1946-48
- Limitations
- Ship-specific for the hull's CG entry/sale dates (the table row names this hull); the caretaker-status narrative is program-level - whether Air Loon herself entered full service or sat in caretaker status is undocumented. Live media.defense.gov URL returns HTTP 403 to automated fetches (confirmed 2026-10-03); verified via Wayback capture (web/2023id_) - archived copy used for content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-02
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[4]ShipbuildingHistory/Naval Marine Archive (Tim Colton data): Robinson Marine Construction yard table, Benton Harbor MI - SC 758 row; and 'U.S.C.G. Air-Sea-Rescue Cutters (WAVR)' table - Air Loon row [other_primary]
- Locator
- navalmarinearchive.com Robinson Marine yard table, SC 758 row; navalmarinearchive.com/sbh/smallships/wavr.html Air Loon row (shipbuildinghistory.com mirror)
- Finding type
- vessel_history
- Finding
- Yard-table corroboration for this hull: SC 758, official number 255475, US Navy Sub Chaser, 136 GT, 110 ft, delivered 14-Sep-43 - disposition 'To USCG 1945 as Air Loon (WAVR 436), sold as Loon.' The companion WAVR table confirms 71 Air-class cutters were delivered to the Coast Guard - 'SC 497-class wooden sub chasers, 111 feet long and 135 tons displacement, mostly built by yacht yards' - and repeats the hull row (758 / WAVR 436 / Air Loon / Robinson Marine Const. / Benton Harbor MI / 14-Sep-43 / 'Sold 1949 as Loon'). Robinson Marine Construction founded 1925 by Glen Robinson, closed 1960.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1948
- Population
- Robinson Marine yard workforce (1942-43)
- Limitations
- Secondary yard-compilation data, not a primary record - used as corroboration only. Conflicts with Flynn/NavSource on two fields: 'To USCG 1945' vs Flynn's precise 24Jan1946, and 'Sold 1949' vs Flynn/NavSource 19Jan1948 - Flynn carried for both (see gaps). Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-03
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[5]HyperWar/ibiblio mirror of 'Ships of the U.S. Navy, 1940-1945' - SC Submarine Chasers (Wooden Hull) index, SC-758 entry (Wayback capture; index page verified via archive) [nhhc_danfs]
- Locator
- ships-sc.html, 'SC Submarine Chasers (Wooden Hull)' table, SC-758-760 row
- Finding type
- vessel_history
- Finding
- The official-source index lists 'SC-758-760' commissioned 1942-44 with no loss or conversion note - confirming this hull remained a U.S. Navy subchaser through the war and survived it (sister hulls in the same block carry loss/conversion notes: SC-751 grounded off W. Australia, SC-752/754/756 Lend-Lease to USSR, SC-757 converted to PGM-2, SC-762-767 Lend-Lease to Brazil).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- Navy crew 1943-46
- Limitations
- Index-level corroboration only - gives commission-era bracket, not deployment detail. The hull's wartime operating area remains undocumented in all sources searched (see gaps). Archived copy used (ibiblio mirror; no live NHHC equivalent page for this unnamed hull). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-04
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[6]Era inference built on: NavSource specifications block (2 x GM/EMD 16-184A diesels, wooden hull, no steam plant); Flynn CG class line (2 diesels, armament removed in CG service); SC-497 class secondary literature (wooden hull, 110 ft); GAO HRD-80-2 Navy asbestos-era documentation (ev-06) [other_primary]
- Locator
- NavSource 12/150758.htm specifications; Flynn class line; GAO HRD-80-2 program context
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel submarine chaser built 1942-43 sits inside the Navy's documented asbestos-use era, but on this vessel type the candidate applications are narrow: diesel engine and exhaust lagging, machinery gaskets and packing, electrical insulation, and minor equipment insulation in the engine room and galley. There is no boiler, turbine, or steam-line lagging pathway - the dominant asbestos load of steam-era combatants does not apply to a 93-ton wooden diesel craft.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1992
- Population
- Robinson Marine construction trades (1942-43); Navy crew 1943-46; USCG caretakers 1946-48; commercial crews 1948-92
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for SC-758. Names era-plausible applications, not confirmed installed materials. No quantity. The wooden hull removes whole product categories (sprayed fireproofing on steel structure, boiler lagging) that drive exposure on larger vessels - inference here is weaker than for a steel steam ship, not stronger.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-05
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[7]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 (1942-43) and service era (1943-48).
- 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 the GAO review centered on shipyard workers at major yards, not 110-foot wooden craft. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403; same standing defect as Batch-01/98) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-06
-
[8]Batch-8131 search ledger (this record): NavSource; Flynn WAVR/W-number lists (USCG historian-hosted); shipbuildinghistory yard and WAVR tables; HyperWar Navy index; NHHC DANFS (no entry exists); NVR (no entry); secondary web litigation sweep; CourtListener (see ledger status) [other_primary]
- Locator
- search_ledger rows sl-uss-sc-758-sc758-01 through -10
- 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-758, PC-758, or USCGC Air Loon (WAVR-436) was found in the public sources searched (see search_ledger). No DANFS entry exists for this hull - NavSource states this explicitly and NHHC returns 404. Secondary web sweeps surfaced no qualifying case; the only 'asbestos aboard subchasers' material is law-firm marketing listicle content asserting class-level claims without primary sourcing - excluded by source policy.
- 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 unnamed small craft generate thin paper trails generally (no DANFS entry, undocumented wartime station). Deck logs, builder's records, and CG cutter records are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-07
-
[9]Designation cross-check: NavSource timeline ('Laid down 6 August 1942 as PC-758... Reclassified SC-758 in April 1943'); Trill fact-QA re-scope 2026-09-29 (crew signs 930-941) - 'PC-758 never existed as a PC vessel (PC-461 class closed enumeration)' [other_primary]
- Locator
- NavSource 12/150758.htm header timeline; batch scope note (Trill fact-QA 2026-09-29)
- Finding type
- vessel_history
- Finding
- CORRECTION/CLARIFICATION: records sometimes index this hull under 'PC-758,' but no vessel ever served as USS PC-758. The hull was laid down under the number PC-758 at Robinson Marine and reclassified SC-758 in April 1943 - three months before launch and five months before commissioning. She was commissioned only as USS SC-758; the steel PC-461-class enumeration that 'PC-758' would imply was never occupied by this or any hull in service.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Limitations
- Corrects a designation indexing artifact, not a material claim. Explains why 'PC-758' produces hits in construction-era records (laid down under that number) while no commissioned PC-758 exists.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-08
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[10]Archival leads not exhausted this session: NARA RG 24 deck logs for USS SC-758 (1943-46); NARA RG 26 Coast Guard cutter records for Air Loon (WAVR-436, 1946-48); Robinson Marine builder's records; Naval Sea Systems Command / Bureau of Ships construction file for the PC-758 contract [other_primary]
- Locator
- NARA RG 24 (deck logs) / RG 26 (USCG records), catalog.archives.gov
- Finding type
- historical_record
- Finding
- Likely-holding repositories identified but not searched at the record level: WWII-era Navy deck logs (RG 24) should carry this hull's 1943-46 movements - the surviving documentation path for her undocumented wartime station; USCG cutter files (RG 26) should carry Air Loon's 1946-48 service; the builder's construction file and the Navy contract file would carry any material specifications.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Limitations
- Archival lead only - NARA's catalog is JS-rendered and could not be queried from this session; whether SC-758's deck logs are digitized is unverified. No claim is made that these records contain asbestos documentation.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-758-sc758-09