Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
-
[1]DANFS, 'SC-701 - SC-800' (Naval History and Heritage Command), SC-730 one-line entry [nhhc_danfs]
- Locator
- SC-730 entry within the SC-701 through SC-800 alphabetical listing; sibling entries SC-731 through SC-733 on the same page attribute all four boats to C. Hiltebrant DD Co., Kingston NY
- Finding type
- vessel_history
- Finding
- SC-730: Built at C. Hiltebrant DD Co., Kingston, N.Y. Keel laid 3/23/42. Launched 6/5/42. Commissioned 11/17/42. Transferred to Maritime Commission 12/16/46.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- Ship's company (wartime complement ~28)
- Limitations
- DANFS lists this hull under SC-730 only and does not mention the PC-730 commissioning designation or the April 1943 reclassification; it gives no service history beyond construction and disposal dates, and no asbestos information. Official NHHC source - verified live 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-01
-
[2]NavSource Naval History, Submarine Chaser Photo Archive, 'SC-730 ex-PC-730' page [other_primary]
- Locator
- Timeline block and Specifications block, SC-730 page
- Finding type
- vessel_history
- Finding
- Designation and disposition timeline: commissioned PC-730 on 17 November 1942; reclassified SC-730 in April 1943; visited Auckland, New Zealand 15-25 September 1944; struck from the Naval Register 21 January 1946; transferred to the War Shipping Administration November 1946; acquired 1949 by Davidson Marine Freight, Ltd. of Vancouver, BC and named Kaigani II; then Tidewater Shipping Co. Ltd., renamed Seymour Narrows in 1951; acquired 1956 by Union Steamship Co. of Vancouver and renamed Triggerfish; sank 6 October 1956 off Whytecliff, West Vancouver. Specifications: 148 t.; 110'10"; 2 x 880 bhp General Motors 8-268A diesel engines, two shafts; complement 28; one 40mm mount, two .50 cal, two Y-guns, two depth charge tracks. Sole wartime CO listed: LTJG R. B. Ayers, USNR (1945).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1956
- Population
- Ship's company; post-war merchant crews (Kaigani II, Seymour Narrows, Triggerfish)
- Limitations
- NavSource is a specialist volunteer archive - authoritative for designation/photo timelines but a secondary compilation; 'transferred to the War Shipping Administration November 1946' conflicts with DANFS 'transferred to Maritime Commission 12/16/46' (WSA was being wound into the Maritime Commission in late 1946) - DANFS date carried for disposal. The 21 January 1946 striking date and the Auckland visit rest on NavSource alone. Page verified live on navsource.net 2026-10-03 (the defunct .org domain not cited).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-02
-
[3]National Archives and Records Administration, Special List #44 - List of Logbooks of US Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (by ship number) [other_primary]
- Locator
- SL-44 ship-number listing, SC-730 line (SC-728..SC-764 block); cross-checked against NARA 'navy-online' digitized list
- Finding type
- historical_record
- Finding
- NARA holds logbooks for SC-730 covering 11/17/1942 through 7/31/1945 - the single entry block for this hull in Special List 44. These logs are not digitized: SC-730 does not appear in NARA's 'Navy Deck Logs Available in the National Archives Catalog' online list (1941 and later), so coverage is physical-holdings only. The 11/17/1942 start coincides with the commissioning date; coverage ends five months before the ship was struck (January 1946).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1945
- Limitations
- Log-coverage dates are not commissioning or decommissioning dates: SL-44 documents which physical logbooks NARA holds, not ship status. No logbooks for this hull are listed after 7/31/1945, so August 1945 through disposal is undocumented at the logbook level - the deck logs themselves were not reviewed (undigitized) and may contain the detailed operational history, overhaul periods, and yard visits this record cannot otherwise supply.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-03
-
[4]Nauticapedia (BC's Heritage Vessel Database), 'Triggerfish (I)' vessel profile - photo credit Vancouver Maritime Museum [other_primary]
- Locator
- Triggerfish (I) vessel profile - Story, Historical Notes, Owners & Masters sections; sister records SC-730 (id=51718), Seymour Narrows (id=24371), Kaigani II (id=15980) cross-linked
- Finding type
- vessel_history
- Finding
- Post-USN career and loss: the vessel was a wooden coastal freighter converted from an ex-USN sub chaser; ownership chain US Navy (1945 record) -> Davidson Marine Freight Ltd., Vancouver (1949-1951) -> Tidewater Shipping Co. Ltd. -> Union Steamship Co., Vancouver (1956). In 1956 she capsized and sank one mile off Whytecliff in Howe Sound with the loss of three lives. Nauticapedia's references include the Transportation Safety Board of Canada (1993), the Canada List of Shipping, and a manuscript list of BC shipping casualties.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1946-1956
- Population
- Canadian merchant mariners; three fatalities in the 1956 loss
- Limitations
- Nauticapedia is a regional heritage database (secondary compilation sourcing TSB and registry records): its 'built 1945c' field approximates the build year to the USN-disposal era and conflicts with the documented 1942 construction (DANFS/NavSource); one metadata field tags the hull 'Steel' while the narrative text says 'wooden' - the text matches the documented SC-497 wooden hull. The three-lives-lost capsizing detail is carried from this source only.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-04
-
[5]uboat.net Allied Warships of WWII, USS SC-730 (SC-730) warship page [other_primary]
- Locator
- Warship data table, ship 8947
- Finding type
- vessel_history
- Finding
- Adds the contract/ordering date: USS SC-730, SC-497-class submarine chaser, built by Hiltebrant Dry Dock Co. (Kingston, NY); ordered 16 February 1942; laid down 23 March 1942; launched 5 June 1942; commissioned 17 November 1942. No commands, operations, or 'end service' data are listed for this hull.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Limitations
- uboat.net is a respected specialist database but a secondary compilation without displayed primary citations for this hull - the 'ordered' date is carried as partial verification only; all other dates agree with DANFS. Absence of listed operations is an absence in this source, not evidence of inactivity.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-05
-
[6]Class/era inference built on: NavSource SC-730 specifications (diesel propulsion, wooden 110-ft hull); Patrol Craft Sailors Association SC class data page; Naval Marine Archive WWII subchaser construction table (SC 730, Hiltebrant DD, Kingston NY) [other_primary]
- Locator
- NavSource SC-730 specifications block; https://www.ww2pcsa.org/subchaser.html class spec block; https://navalmarinearchive.com/sbh/smallships/pc2.html table row 'SC 730'
- Finding type
- asbestos_application
- Finding
- Asbestos applications plausible aboard this hull type are era-standard and limited: the SC-497 class was wooden-hulled and diesel-powered (two GM 8-268A engines), so there was no boiler, steam-line, or turbine lagging pathway. Era-typical applications on a 1942 diesel subchaser would be engine and exhaust-system lagging, gaskets, valve and machinery packing, electrical insulation, and localized fireproofing - a materially lighter asbestos profile than steam-driven vessels of the same era.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1956
- Population
- Hiltebrant construction trades (Kingston NY, 1942); ship's company 1942-1946; Canadian conversion/merchant crews 1949-1956
- Limitations
- No source names asbestos aboard SC-730/PC-730: this is class/era inference only. Wooden hull construction reduced but did not eliminate era asbestos use; nothing here establishes presence, quantity, or disturbance aboard this hull, and it must not be read as ship-proven.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-06
-
[7]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (October 18, 1979) [gao]
- Locator
- GAO product page, Highlights section
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's efforts to protect workers from asbestos exposure at Long Beach and Norfolk Naval Shipyards, covering the use of asbestos in Navy ships, the cost of removing asbestos from Navy ships, and compensation programs - confirming Navy-wide shipboard asbestos-insulation use through the era and the 1975/1979 remove-and-replace policies.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 review of WWII-era through 1970s practice
- Population
- Naval shipyard workforce (program context)
- Limitations
- Program-level documentation: it does not name this hull or the SC-497 class and does not establish that asbestos was installed aboard this vessel. gao.gov returns HTTP 403 to direct automated fetches; content was verified 2026-10-03 via the rendered product page (highlights section) - the 26-page full-text PDF was not extracted this session.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-07
-
[8]Batch-8104 search ledger (this record): DANFS SC-701-SC-800 page; NavSource SC-730 and SC-731 pages; NARA Special List 44 and navy-online digitized-logs list; uboat.net warship page; Nauticapedia vessel profiles; Naval Marine Archive subchaser table; Patrol Craft Sailors Association class page; GAO HRD-80-2; CourtListener ship-designation sweeps; general web asbestos sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-730-pc730-01 through sl-uss-pc-730-pc730-14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, litigation naming PC-730 or SC-730, or museum/registry hazmat note was found in the sources searched (see search_ledger). CourtListener hits under the hull designations were name collisions only (Indiana post-conviction docket numbers).
- 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 - wooden diesel subchasers of this era carried limited asbestos applications as inference, and the hull's 1956 sinking forecloses any present-day survey. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-08
-
[9]Designation/class cross-check: NavSource SC-730 page ('Commissioned PC-730 17 November 1942; Reclassified SC-730 in April 1943'); NavSource SC-731 sister page (identical PC->SC April 1943 reclassification); DANFS SC-730 entry; batch VERI file (canonical SC-730; class = SC-497, not PC-461) [other_primary]
- Locator
- NavSource pages 150730.htm and 150731.htm header blocks ('ex-PC-730' / 'ex-PC-731')
- Finding type
- vessel_history
- Finding
- This hull is an SC-497-class 110-foot wooden-hulled submarine chaser that was commissioned under the patrol-craft designation PC-730 and reclassified to SC-730 in April 1943 - it is NOT a PC-461-class 173-foot steel patrol craft, despite the PC hull number. The identical reclassification on the sister-hull NavSource page (PC-731 -> SC-731, same builder and program block) shows this was the program-wide reversion of 110-foot wooden boats from PC to SC numbers, not a one-off.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Limitations
- The reclassification rests on NavSource ship pages (verified across two sister hulls); DANFS files the hull under SC-730 without mentioning PC-730, so the commissioning designation is NavSource-sourced. The April 1943 date is given as a month, not a day, by NavSource.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-730-pc730-09