Evidence
13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).
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[1]research packet 934-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-753-sc753-pkt-934-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, USCGC Air Linnet (WAVR-435) ex-USS SC-753 ex-PC-753 - milestone list, specifications, commanding officer, call signs, civilian ownership chain (verified live 2026-10-03) [other_primary]
- Locator
- NavSource 12/150753.htm - class header block, milestone list, Specifications block, Commanding Officers table
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 8 May 1942 as PC-753 by the Robinson Marine Construction Co., Benton Harbor, MI; launched 4 January 1943; reclassified and commissioned USS SC-753, 14 April 1943; decommissioned October 1945; transferred to the Coast Guard 1 December 1945; commissioned USCGC Air Linnet (WAVR-435) 4 December 1945; struck from the Naval Register 3 January 1946; sold 24 September 1947 to Robert L. Parker of Los Angeles, CA for use as a yacht and renamed Halcyon II; acquired 1950 by George Donald Price of San Pedro, CA for use as a fishing boat; acquired 1954 by William H. Murphy of San Diego, CA; acquired 1960 by Minnie P. Goldman of Kansas City, KS; acquired 1967 by Lawrence H. Broadbent of Terminal Island, CA; out of documentation 1974; fate unknown. Spec block: disp. 95 t.; l. 110'10"; b. 17'; d. 6'6"; s. 21 kts.; cpl. 28; armament one 40mm, one/two twin-mount .50 cal. machine guns, two/three K-guns, 14 depth charges with six single release chocks, two Mk 20 Mousetrap rails with four 7.2-inch projectiles; two 1,540 bhp GM (Electro-Motive Div.) 16-184A diesels, two shafts. Commanding officer listed: LTJG Robert Tepper, USNR, 14 April 1943. Page states explicitly: 'There is no DANFS history available for SC-753.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1974
- Population
- Robinson Marine construction trades (1942-43); Navy crew (1943-45); Coast Guard crew/caretakers (1945-47); civilian owners (1947-74)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track official sources but no primary citation is shown per line. Ship-specific history only; no asbestos or material content. No photograph of this hull exists in the archive ('No image of SC-753 is available at this time').
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-01
-
[3]James T. Flynn, Jr., HMC USNR(ret), 'U.S. Coast Guard Patrol Craft - Major Classes, 100-feet to 150 feet in Length, 1915 to 2012' (Part 1 of 2, hosted on media.defense.gov; direct curl blocked by edge ACL, full text via Firecrawl) [other_primary]
- Locator
- FLYNNPATROLCRAFT2012.PDF, Part 2 '110-foot World War II SCs - Air Class WAVRs' table, WAVR-435 row; program narrative pp. 8-10
- Finding type
- vessel_history
- Finding
- Official USCG-hosted patrol-craft list names this hull: 'WAVR 435 | Air Linnet | ex. SC-753 | 1Dec1945 | Sold 24Sep1947.' Flynn's program narrative for the 'Air Class' WAVRs: surplus USN 110-foot wooden submarine chasers were converted to Air Rescue Vessels (WAVR) at war's end to meet the surge in air-crash rescues during the Magic Carpet demobilization; 'Quickly stripped of their armament,' they were 'In Commission in Reserve' with two-man caretaker skeleton crews because release of Coast Guard Reservists left the service unable to man them fully - 'very few WAVR's actually entered full service.' Class figures in the same source: displ. 134 t. fl; 110'10" x 17' x 6.5'; 2 diesels 1,540 (or 800) hp, 2 screws; 21 (or 15.6) kts; cpl. 3 officers + 25 enlisted; arm. 1-3"/23, 2-50 cal MG, 2 mousetrap, 2 DC tracks '(Removed in CG Service)'.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-1947
- Population
- Coast Guard WAVR crews/caretakers (1945-47)
- Limitations
- Row-level table data is a compiled list, not a per-hull log - it documents designation, entry date, and disposal, not what the vessel actually did in CG service. The 'In Commission in Reserve'/caretaker pattern is program-level; Flynn does not state Air Linnet's own manning status individually, though sale after 21 months is consistent with it. media.defense.gov returns 403 to automated curl; content verified via Firecrawl extraction of the live PDF 2026-10-03. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-02
-
[4]James T. Flynn, Jr., 'U.S. Coast Guard "W" Numbers' (media.defense.gov, via Firecrawl) [other_primary]
- Locator
- FLYNN_USCG-W-NUMBERS2014.PDF, W-number sequence table, WAVR 430s block
- Finding type
- vessel_history
- Finding
- Flynn's USCG hull-number cross-index independently confirms the designation: 'WAVR 435 | Air Linnet | ex. SC-753' - the Coast Guard's W-number assignment table pairing cutter number WAVR-435 with ex-Navy hull SC-753.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-1947
- Limitations
- Designation cross-index only - no service dates or narrative per hull; corroborates ev-02's table row. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-03
-
[5]HyperWar transcription of 'Ships of the U.S. Navy, 1940-1945' (official USN compilation), Submarine Chasers (Wooden Hull) section, SC-497 class listing [other_primary]
- Locator
- ships-sc.html, SC-497 class table, SC-753 row
- Finding type
- vessel_history
- Finding
- The official compilation lists SC-753 in service '1942-44' with no loss notation or remarks - consistent with an unremarkable war and survival to disposal. Same table documents the fates of her Robinson Marine sisters: SC-752, SC-754, SC-756 Lend-Lease to the USSR; SC-757 converted to Motor Gunboat PGM-2; SC-751 grounded at Australia 22 June 1943.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1944 (listing window)
- Population
- Navy crew (1943-45)
- Limitations
- Gives commissioning-era service window only; no station, operating area, or event detail for this hull. '1942-44' is the compilation's coverage convention for war-built hulls, not a literal decommission date. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-04
-
[6]NARA Special List #44 'List of Logbooks of US Navy Ships, Stations, and Miscellaneous Units, 1801-1947' (RG 24 Entry 118) + NARA USCG Logbooks finding aids (RG 26 Entry 159F): uscg-logs-1944.pdf and uscg-logs-1945.pdf [other_primary]
- Locator
- sl-44-ship-number.pdf p. with SC-75x block ('SC-753 4/14/1943 12/1/1945'); uscg-logs-1944.pdf 'SC 753' entries; uscg-logs-1945.pdf 'SC 753' entries; uscg-logs-1943.pdf (no entry)
- Finding type
- historical_record
- Finding
- Both logbook finding aids name this hull. Navy series (Special List #44, ship-number index): 'SC-753 - 4/14/1943 - 12/1/1945' - logbooks indexed for her entire commissioned Navy service through the day of transfer to the Coast Guard. Coast Guard series (RG 26 Entry 159F): 'SC 753' appears in the 1944 volume for June-July, August-October, and November-December, and in the 1945 volume for January-May and June-November - continuous Coast Guard logbook custody June 1944 through November 1945. She does not appear in the 1943 USCG logbook index. Neither series is digitized; NARA's online deck-log list contains no SC-753 entry.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1945
- Population
- Navy/CG crew; potential source for manning, stations, movements
- Limitations
- Archival lead only: finding aids prove logbooks exist and their dates, not their contents - operating areas, ports, and manning detail are inside the undigitized volumes at NARA College Park. CG-series logbook custody beginning June 1944 indicates Coast Guard involvement with this hull by mid-1944 (see ev-06 for the CG-manned-SC program context); whether she was Navy-manned or CG-manned April 1943-May 1944 is unresolved. Box numbers transcribed from PDF text (1944: boxes 752-754; 1945: boxes ~261/262 and ~269/270 - box-number pairing approximate due to multi-column layout).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-05
-
[7]HyperWar transcription of 'The Coast Guard at War,' Vol. I (Escorts), U.S. Coast Guard official history - 'Coast Guard Manned Navy Vessels' section [other_primary]
- Locator
- USCG V1-Escorts index, 'Navy Vessels - Coast Guard Manned Navy Vessels' paragraph
- Finding type
- historical_record
- Finding
- The official Coast Guard war history records: 'The Navy vessels which the Coast Guard manned during the war included ... 6 Submarine Chasers (SC) ... a total of 351' Navy vessels manned by the Coast Guard. SC-753's logbooks sit in the USCG records series continuously from June 1944 through November 1945 (ev-05) - consistent with this hull being one of the six Coast Guard-manned Navy submarine chasers for at least the back half of the war.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- Coast Guard crews aboard Navy SCs (6 boats total)
- Limitations
- Program-level statement; the volume does not name the six SCs individually, so identification of SC-753 as one of them is inference from her logbook custody, not a named finding. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-06
-
[8]shipbuildinghistory (Tim Colton), 'Sub Chasers Built During WWII' table + uboat.net Allied Warships entry for USS SC-753 [other_primary]
- Locator
- shipbuildinghistory pc2 table, SC-753 row and table header/notes; uboat.net/allies/warships/ship/8970.html data block
- Finding type
- vessel_history
- Finding
- Build-table corroboration: 'SC-753 | Robinson Marine | Benton Harbor MI | 148 | 110 | 14 Apr 1943 | to USCG 1945 as Air Linnet (WAVR-435)' - matching NavSource on builder and commissioning/delivery date. uboat.net adds 'Ordered 16 Feb 1942' and records transfer to the Coast Guard 4 December 1945 (the CG commissioning date, vs the 1 December transfer date in NavSource/Flynn). Table-level class context: 973 sub chasers and related craft built during WWII by 74 boatbuilders and yachtbuilders; about 70 converted to Coast Guard air-sea-rescue boats (WAVR).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1947
- Population
- Robinson Marine construction trades (1942-43)
- Limitations
- Both are rigorous secondary compilations but secondary nonetheless - the 'ordered' date and the 148-light-ton displacement rest on undocumented compilation sourcing. 'Delivered' column value (14 Apr 1943) coincides with the commissioning date. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-07
-
[9]NavalCoverMuseum (Museum of Naval Postal History), USCGC AIR LINNET WAVR-435 ship page + USS SC-753 Covers Page 1 [museum_official]
- Locator
- navalcovermuseum.org USCGC AIR LINNET WAVR-435 designation table; USS SC-753 Covers Page 1 (1943-04-23 entry)
- Finding type
- vessel_history
- Finding
- Designation chronology independently matches NavSource: laid down 8 May 1942 as PC-753, launched 4 January 1943, 'USS SC-753 - Redesignated and Commissioned April 14 1943,' transferred to U.S. Coast Guard 1 December 1945, 'USCGC Air Linnet WAVR-435 - Commissioned by USCG December 4 1945,' struck from Naval Register 3 January 1946, sold 24 September 1947, fate unknown. A 23 April 1943 cover exists (Locy Type 3z postmark) annotated 'Posted from another ship or station... Ship had no post office' - a commissioning-era philatelic artifact confirming the hull in service.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943
- Limitations
- Philatelic museum compilation; designation dates corroborate NavSource rather than add independent primacy. The cover documents existence and era, not location (posted from another ship/station). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-08
-
[10]Era inference built on: NavSource spec block (wooden 110-foot SC-497 class, GM 16-184A diesels); Flynn class figures; shipbuildinghistory class table; GAO HRD-80-2 era documentation (see ev-10) [other_primary]
- Locator
- NavSource specifications block; Flynn class figures; shipbuildinghistory class context
- Finding type
- asbestos_application
- Finding
- A wooden-hulled, diesel-powered 95-148-ton patrol craft of 1942-43 construction sits inside the Navy's asbestos-use era, but with a much smaller application envelope than steam vessels: no boilers, no turbines, no steam lines - so no boiler/turbine lagging pathway at all. Era-standard asbestos applications aboard a boat of this type and period were limited to diesel exhaust lagging, engine gaskets and valve packing, and electrical insulation. Wooden 'splinter fleet' hulls carried neither the pipe-lagging density nor the confined engineering spaces of larger combatants.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1974
- Population
- Robinson Marine construction trades (1942-43); Navy crew (1943-45); CG crew/caretakers (1945-47); civilian owners (1947-74)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or logbook extract located for SC-753. Names era-standard applications, not confirmed installed materials. No quantity possible. The application set is genuinely minimal for this type - a wooden diesel craft of 110 feet is among the lowest-asbestos-envelope vessel types in the WWII fleet.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-09
-
[11]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 (1943-47).
- 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 - same standing defect as Batches 01/98) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-10
-
[12]Batch-8127 search ledger (this record): NavSource; Flynn patrol-craft and W-number PDFs (media.defense.gov); HyperWar Ships of USN 1940-45 + Coast Guard at War; NARA Special List #44 and USCG logbook finding aids; NavalCoverMuseum; shipbuildinghistory; uboat.net; CourtListener; secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-sc-753-sc753-01 through -14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record, or verified litigation naming USS SC-753, PC-753, or USCGC Air Linnet (WAVR-435) was found in the public sources searched (see search_ledger). The secondary web sweep surfaced nothing at all naming this hull on asbestos - unusually clean: not even the law-firm listicle sources that assert asbestos aboard other SC-class boats make an SC-753 claim.
- 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. Undigitized Navy and Coast Guard logbooks (ev-05) remain the open primary leads for both service detail and any aboard-materials references. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-11
-
[13]Designation cross-check: NavSource milestone list ('Laid down 8 May 1942 as PC-753... Reclassified and commissioned USS SC-753, 14 April 1943'); NavalCoverMuseum chronology; shipbuildinghistory numbering table [other_primary]
- Locator
- NavSource 12/150753.htm and 12/150754.htm milestone lists; NavalCoverMuseum designation table
- Finding type
- historical_record
- Finding
- CORRECTION: this hull is USS SC-753, not 'USS PC-753.' She was laid down under the designation PC-753 but was reclassified to SC-753 at/before commissioning (14 April 1943 per NavSource; sister SC-754's parallel page shows the same laid-down-PC/commissioned-SC pattern). The PC-753 designation never attached to an operating vessel: the PC-461-class enumeration of 173-foot steel patrol craft closed well below 753, and the wartime renumbering reassigned 700-series numbers on these 110-foot wooden hulls to the SC series before they entered service.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Limitations
- Corrects the enumeration scoping note in the batch assignment, not a material claim. The exact reclassification date inside April 1943 is not separately documented (NavSource folds it into 'Reclassified and commissioned ... 14 April 1943'). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-753-sc753-12