Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]NavSource Online: Submarine Chaser Photo Archive, SC-745 (ex-PC-745) page 12/150745 - construction milestones, designation history, disposal, specifications, wartime photo captions [other_primary]
- Locator
- NavSource 12/150745.htm header block, timeline, specifications block, and photo caption table
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 7 March 1942 by Quincy Adams Yacht Yard, Inc., Quincy, MA; launched 15 June 1942; commissioned USS PC-745, 6 August 1942; reclassified SC-745 in April 1943; struck from the Naval Register 26 February 1946; transferred to the State Department Foreign Liquidation Commission 9 February 1948 and transferred to the Philippines; fate unknown. Call sign Nan-Xray-Mike-Nan. Specifications: 95 t., 110'10" x 17' x 6'6", 21 kts., complement 28, one 40mm mount, one/two twin .50 cal. machine guns, two/three depth-charge K-guns, 14 depth charges, two Mk20 Mousetrap rails; propulsion two 800bhp General Motors 8-268A diesels, Snow & Knobstedt single reduction gear, two shafts. Photo captions document: in drydock astern of SC-648 (Treadwell/Splinter Fleet photos, the c.1944 example captioned Seeadler Harbour, Manus, Admiralty Islands); at Hollandia, New Guinea c.1944; and SC-742, SC-743, SC-738 and SC-745 nested at Subic Bay, Philippines c.1946 (photo source Joe Radigan). Page states: 'There is no DANFS history available for SC-745' and 'SC-745 served the Navies of the United States and the Philippines.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1948
- Population
- Quincy Adams Yacht Yard construction trades (1942); USN crew (1942-46); Philippine Navy/Naval Patrol crew (1948-on, undocumented)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track NVR/DANFS but it is the principal public record for this hull class. Contains no asbestos content. 'Fate unknown' is the compiler's disclosure that Philippine-service identity and final disposition are undocumented. Specifications are class-block data; sister pages differ on speed (15.6 vs 21 kts).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-01
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-742 (ex-PC-742) page 12/150742 - Subic Bay nest photograph caption [other_primary]
- Locator
- NavSource 12/150742.htm photo table, third row (image 1215073804); same image on 12/150745.htm
- Finding type
- historical_record
- Finding
- Contemporary photographic record placing this hull in the Philippines at war's end: the c.1946 Subic Bay photograph (image 1215073804, source Joe Radigan) is captioned 'SC-742, SC-743, SC-738 and SC-745 nested at Subic Bay.' The same captioned image is displayed on the SC-745 page itself. This is direct photographic documentation of SC-745's physical presence at Subic Bay c.1946, nested with three sister SC-497-class boats - consistent with the post-hostilities staging of small craft awaiting Foreign Liquidation Commission disposal in the Philippines.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- circa 1946
- Population
- SC-745 crew at Subic Bay c.1946; nest-mate crews of SC-738, SC-742, SC-743
- Limitations
- Photo caption evidence only - establishes presence at Subic Bay c.1946, not the work or condition of the hull there. 'c.1946' is the caption's approximate date. NavSource is a secondary compilation; the caption credits volunteer photo contributor Joe Radigan. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-02
-
[3]Royal Australian Navy, Sea Power Centre - Combined Operational Intelligence Centre, GHQ South West Pacific Area, 'Daily Naval Summary / Daily Appreciation: Pacific & Indian Ocean Naval Activity' (MOST SECRET wartime series), 1-30 June 1943 volume (No. 435 onward, daily issues); companion 1-30 April 1943 volume order-of-battle listing [other_primary]
- Locator
- seapower.navy.gov.au documents/01-30_June_1943.pdf (indexed excerpt); documents/01-30_April_1943.pdf order-of-battle listing (indexed excerpt); Wayback capture 20241212080850 (truncated)
- Finding type
- historical_record
- Finding
- A wartime Allied operational record naming this hull: the June 1943 COIC Daily Naval Summary issues report '"SUMNER" "SC.745" "SC.749" surveying Deboyne Is. area' - SC-745 operating with the U.S. survey ship USS Sumner (AG-32) and sister chaser SC-749 on survey duty in the Deboyne Islands, Louisiade Archipelago, Papua. The April 1943 volume's order-of-battle listing includes SC.745 among South West Pacific Area vessels (a line reading 'YMS.47 YMS.48 YMS.70 SC.738 SC.740 SC.745 SC.747 SC.749 SC.750 PC.1119'). This is a primary wartime government document placing SC-745 on operational survey duty in the SW Pacific in the second quarter of 1943 - the only located period operational record naming the hull.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- April-June 1943
- Population
- SC-745 crew; USS Sumner (AG-32) survey party; SC-749 crew - Deboyne Islands survey operation
- Limitations
- VERIFIED-PARTIAL: the live PDF (56.8 MB, scanned, OCR text layer) timed out on every fetch attempt from this network (curl exit 92/timeout, webfetch timeout, firecrawl no-extract), and the sole Wayback capture (2024-12-12) is truncated at 1,048,576 bytes - the hull-mentioning pages were not retrievable in full text. Content verified through search-engine index excerpts of the official PDF only; exact issue numbers/page positions not recoverable. Corroborated by DANFS: USS Sumner sailed to the Deboyne Islands in March 1943 to make a survey and remained in the area. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-03
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[4]uboat.net Allied Warships of WWII, USS SC-745 (SC-745), SC-497 class - build data including order date [other_primary]
- Locator
- uboat.net/allies/warships/ship/8962.html data table
- Finding type
- vessel_history
- Finding
- Independent secondary compilation corroborating the build record and adding the order date: 'Built by Quincy Adams Yacht Yard Inc. (Quincy, Massachusetts, U.S.A.); Ordered 16 Feb 1942; Laid down 7 Mar 1942; Launched 15 Jun 1942; Commissioned 6 Aug 1942.' Class listed as SC-497, pennant SC-745, navy US. No commands or service-history entries are listed for this hull ('We don't have any commands listed for USS SC-745').
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942
- Limitations
- Secondary compilation - order date (16 Feb 1942) appears here but not on NavSource; consistent with the 7 March 1942 laying. No service narrative, no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-04
-
[5]ShipbuildingHistory (Tim Colton), Quincy Adams Yacht Yard vessel table + Sub Chasers list (shipbuildinghistory.com / mirror shipbuildinghistory.njscuba.net) [other_primary]
- Locator
- shipbuildinghistory.com/shipyards/yachtsmall/adams.htm (SC 745 row); shipbuildinghistory.com/smallships/pc2.htm (SC-745 row; njscuba.net mirror also live)
- Finding type
- vessel_history
- Finding
- Independent yard-build table corroborating construction: Quincy Adams Yacht Yard (Quincy MA) table lists 'SC 745 | US Navy | Sub Chaser | 136d | 110 | 6-Aug-42 | Transferred overseas 1947' - type 136d, 110 feet, delivery/completion 6 August 1942 (matching the commissioning date, consistent with direct commissioning on delivery). The consolidated subchaser list reads 'to FLC 1948.' Sister yard-mates: SC-744 (kamikazied in Leyte Gulf, lost 27-Nov-44), SC-746, SC-748, SC-749 ('to FLC 1948'/'overseas 1947'), SC-747 'to the Philippines 1948 as Surigao (P-17)', SC-750 'to the Philippines 1948 as Isabella (P-18)'.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1948
- Population
- Quincy Adams Yacht Yard construction trades (1942)
- Limitations
- Secondary industry compilation (the standard public build-list for small wartime yards). Internal inconsistency: the yard table says 'Transferred overseas 1947' while the hull list and NavSource put the FLC transfer in February 1948 - carried in gaps. 'Transferred overseas' wording is vaguer than NavSource's FLC-then-Philippines sequence. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-05
-
[6]The Maritime Review (Philippines), 'Our Submarine Chasers' by Mark R. Condeno (24 Mar 2023) - Philippine Navy Offshore Patrol ex-US SC disposition [reputable_press]
- Locator
- maritimereview.ph/our-submarine-chasers/ - 'COMMISSIONING & DECOMMISSIONINGS' and SC-497 list sections
- Finding type
- historical_record
- Finding
- Philippine-service context for the transfer: the ex-US SC-497-class (110' type) chasers 'were all jointly commissioned on 02-July-1948' into the reconstituted Offshore Patrol and 'spent most of their early days in training the nucleus of the Offshore Patrol crew at the United States Navy in Subic Bay Naval Base'; fourteen 110-foot SC units served under RPS names (Alert PY-54, Cagayan P-14, Cavite P-19, Ilocos Norte/Malampaya Sound, Ilocos Sur P-16, Isabela P-18, Mountain Province P-15, Surigao P-17) 'plus 6 unknown named vessels of the type'; four of the class were decommissioned in 1956, the rest during the 1960s. SC-745 is not named in the article - if she received an RPS name it is among the undocumented ones, consistent with NavSource's 'fate unknown.'
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1948-1960s
- Population
- Philippine Naval Patrol/Offshore Patrol crews (1948-1960s), trained at Subic Bay
- Limitations
- Class-level context only - does not name SC-745 or document her Philippine identity/pennant. Author is a Philippine Navy/Coast Guard Auxiliary historian citing Jane's, Conway's, and Philippine Navy official histories; reputable secondary, not a registry. The article's 'SC 173 Type (PC-461 Class)' labeling conflates the 173' PCs with SC designations - a known loose usage; do not take its class labels literally. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-06
-
[7]Era inference built on: NavSource SC-745 spec block (GM 8-268A diesel pair, wooden-hull SC-497 class); ShipbuildingHistory type-136d 110' design entry; GAO HRD-80-2 Navy asbestos-era documentation (see ev-uss-sc-745-08); SC-497-class wooden construction documented across the class [other_primary]
- Locator
- NavSource 12/150745.htm specifications block; shipbuildinghistory.com yard table type/length entries
- Finding type
- asbestos_application
- Finding
- A 110-foot wooden-hulled submarine chaser with a diesel plant, built March-June 1942 inside the Navy's documented asbestos era. Era-standard applications aboard a small diesel craft of this period: engine and exhaust lagging in the machinery spaces, gaskets and valve/flange packing on fuel and cooling piping, electrical insulation, and localized heat insulation. There is no steam plant - the boiler/steam-line lagging pathway of steam vessels does not apply - and the wooden hull carried far less installed fireproofing than steel combatants; any asbestos aboard would have been confined to machinery-space and piping components.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1942-1960s
- Population
- Quincy Adams Yacht Yard construction trades (1942); USN crew (1942-46); Philippine crew (1948-on); any disposal/shipbreaking trades
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or builder spec sheet located for SC-745. Names era-standard applications, not confirmed installed materials. No quantity. Asbestos presence aboard this hull is reasonable era inference, not ship-proven.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-07
-
[8]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), US service era (1942-46/48), and any material carried over into Philippine service.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- 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 2026-10-04) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-08
-
[9]NavSource 110' Submarine Chaser (SC) photo index (ex-PC designation pattern across the SC-497 class) + NavSource SC-745 timeline entry [other_primary]
- Locator
- NavSource 12/15idx.htm (ex-PC markings through the SC-497 block); NavSource 12/150745.htm timeline
- Finding type
- historical_record
- Finding
- DESIGNATION CLARIFICATION: this hull commissioned as USS PC-745 on 6 August 1942 and was reclassified SC-745 in April 1943, but it was never a PC-461-class patrol craft. The PC-461 class comprised 173-foot steel patrol vessels; SC-745 was always a 110-foot wooden SC-type submarine chaser that briefly carried a PC-7xx designation. The NavSource SC index shows the same ex-PC marking on dozens of SC-497-class hulls (ex-PC-330, ex-PC-353, ex-PC-497, ex-PC-498, ex-PC-503/504 and the PC-7xx block) - the April 1943 blanket reclassification resolved a wartime administrative overlap between the two designation series. Records that index this hull as 'USS PC-745' or imply a patrol-craft vessel are describing the same wooden SC hull, not a separate ship.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1943
- Limitations
- Designation disambiguation, not a material claim. The April 1943 reclassification date comes from NavSource timeline entries across the class; the underlying general-order documentation was not separately located. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-09
-
[10]Batch-8119 search ledger (this record): NavSource SC-745/SC-742/SC-index pages; ShipbuildingHistory yard + hull lists; uboat.net; RAN COIC Daily Naval Summary (indexed excerpts); Maritime Review (Philippine service); DANFS Sumner (ibiblio transcription); CourtListener (1 of 4 base queries run - see ledger); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-sc-745-01 through sl-uss-sc-745-14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming USS SC-745/PC-745 was found in the public sources searched (see search_ledger). The CourtListener exact-name opinion query returned 11 hits, ALL name collisions (Kentucky/Alabama/Georgia docket-number and reporter-citation artifacts) - zero qualifying cases; the remaining three base queries ("SC-745" docket, "PC-745" opinion, "PC-745" docket) could not be run this session - the fleet pacing budget was spent (logged pending/blocked, not as a negative result). Secondary web sweeps surfaced no qualifying case and no hull-specific 'asbestos aboard' claims beyond the usual law-firm pattern (none encountered naming this hull). No DANFS entry exists for SC-745.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard. The litigation search is partially open: 1 of 4 mandated base queries ran clean; the other 3 were fleet-paced out and remain open leads. Deck logs, builder records, and any Philippine disposal file are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-745-10