Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 866-packet.md (1 sources cited) [nhhc_danfs]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-ridgway-pc1193-pkt-866-packet-md
-
[2]DANFS, Ridgway (PC-1193), Vol. VI p. 108 (namesake, spec block, full service narrative, naming, sale; verbatim transcription - live NHHC page 404s, hazegray.org unreachable) [nhhc_danfs]
- Locator
- DANFS Ridgway entry (Vol. VI p. 108), spec block + full service narrative
- Finding type
- vessel_history
- Finding
- DANFS record for this hull: Ridgway named for towns in Colorado and Pennsylvania. Spec block: dp. 348; l. 174'9"; b. 23'; dr. 7'6"; s. 20.2 k.; cpl. 65; a. 1 3", 1 40mm., 2 20mm., 2 dcp., 2 dct., 2 rkt. A steel-hulled submarine chaser laid down 30 June 1942 by Consolidated Shipbuilding Corp., Morris Heights, N.Y.; launched 29 August 1942; commissioned at the New York Navy Yard 21 January 1943, Lt. Marion L. Bohgren in command. Assigned to Service Squadron 1, Service Force, Atlantic; departed New York 13 February 1943 for the Submarine Chaser Training Center, Miami, Fla., arriving 26 February; after two weeks' training commenced extensive patrol operations out of Miami on 17 April 1943; patrol and escort services out of Miami through the end of hostilities with periodic Charleston, S.C., availabilities. Returned to New York 10 December 1945, tentatively scheduled for disposal; departed New York 16 November 1946 via Cape Cod Canal, Halifax, Nova Scotia, and Quebec to patrol duty on Lake Ontario. Decommissioned at Boston 2 March 1950 and placed in reserve; named Ridgway 1 February 1956; sold to Hughes Brothers, Inc., 16 September 1959.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1959
- Population
- Consolidated Shipbuilding construction trades (1942); commissioning and wartime crew (design complement 65); Naval Reserve Training crews and trainees (1946-1950); New York Navy Yard fitting-out trades (1943); Charleston availability repair trades (1943-45)
- Limitations
- Ship-specific history only; no asbestos or material content. Live NHHC DANFS page returned 404 on 2026-10-03 for all candidate URLs and hazegray.org is unreachable; the losthistory.net/hazegray verbatim transcription is cited and was verified live this session. Naming date '1 February 1956' conflicts with NavSource's '15 February 1956' - carried in gaps. The 1945-46 narrative sequence ('returning to New York 10 December 1945' then 'departed New York 16 November 1946') omits the July 1946 Naval Reserve Training placement NavSource documents.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-01
-
[3]NavSource Online: Submarine Chaser Photo Archive, Ridgway (PC 1193) ex-PC-1193 - designation timeline, specifications incl. propulsion serials, call sign, commanding officer [other_primary]
- Locator
- NavSource 12/011193.htm header timeline block, specifications block, and commanding-officers table
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: PC-461-class submarine chaser, call sign November-Quebec-Charlie-Alpha. Laid down 30 June 1942 at Consolidated Shipbuilding Corp., Morris Heights, NY; launched 29 August 1942; commissioned USS PC-1193, 21 January 1943 at New York Navy Yard, New York, NY; placed in service as a Naval Reserve Training vessel in July 1946 at the 3rd Naval District (New York); decommissioned 2 March 1950 at Boston, MA and laid up in the Atlantic Reserve Fleet, Boston Group; named Ridgway 15 February 1956; sold for scrap 16 September 1959 to Hughes Brothers, Inc. Specifications: displacement 450 t.; length 173' 8"; beam 23'; draft 10' 10"; speed 20.2 kts.; complement 65; armament one 3"/50 dual purpose gun mount, one 40mm gun mount, five 20mm guns, two rocket launchers, and two depth charge tracks; propulsion two 1,440 bhp Hooven-Owen-Rentschler R-99DA diesel engines (Serial No. 6833 and 6834), Westinghouse single reduction gear, two shafts. Commanding officer listed: LT Marion Lowell Bohgren, USN, 21 January 1943.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1959
- Population
- Crew (1943-46); Naval Reserve Training crew and reservist trainees, 3rd Naval District (1946-50); Atlantic Reserve Fleet, Boston Group (1950-59)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track NVR/DANFS. Spec block differs from DANFS (displacement 450 t. vs 348; draft 10'10" vs 7'6"; five 20mm vs two; no dcp listed) - wartime fit variation and source variance carried as documented, not reconciled. The 15 February 1956 naming date conflicts with DANFS's 1 February 1956 - carried in gaps. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-02
-
[4]ShipbuildingHistory yard table, 'Consolidated Shipbuilding, Gas Engine & Power, Charles L. Seabury - Morris Heights NY' (hull-by-hull delivery table and yard history) [other_primary]
- Locator
- shipbuildinghistory.com/shipyards/yachtsmall/consolidated.htm, Consolidated Shipbuilding table, hull 3123 row
- Finding type
- vessel_history
- Finding
- ShipbuildingHistory Consolidated yard table row for this hull: Consolidated yard hull number 3123; 'PC 1193 | US Navy | Sub Chaser | 463d | 173 | 21-Jan-43 | Named Ridgway 1956, scrapped 1959.' The adjacent rows place PC-1192 (hull 3122) and PC-1194 (hull 3124) in the same Consolidated construction block. Yard history: the Morris Heights yard stood on Matthewson Road in the Bronx at what is now Roberto Clemente State Park; the company descended from Gas Engine & Power Co. (1885) and Charles L. Seabury Co. (1889), bought the Robert Jacob shipyard on City Island after WWII, closed Morris Heights, and ceased active boatbuilding in 1958.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Population
- Consolidated Shipbuilding yard workforce, Morris Heights, Bronx (1942)
- Limitations
- Specialist secondary compilation (shipbuildinghistory.com) - not a primary registry, though its yard tables are a standard reference. Delivery date '21-Jan-43' coincides with the commissioning date, consistent with the era's delivery-then-commission sequence. No asbestos content; the table documents construction, not materials.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-03
-
[5]uboat.net Allied Warships, USS PC-1193 (PC-1193) - spec table and commanding-officer roster [other_primary]
- Locator
- uboat.net warship page 8720 (spec table + Commands listed)
- Finding type
- vessel_history
- Finding
- uboat.net Allied Warships entry for this hull: ordered 27 February 1942; built by Consolidated Shipbuilding Corp. (Morris Heights, New York); laid down 30 June 1942; launched 29 August 1942; commissioned 21 January 1943; end service 2 March 1950; decommissioned 2 March 1950; sold to be broken up for scrap 16 September 1959. Its commanding-officer roster lists eight WWII commanders beginning with Lt.(j.g.) Loren Hall Kiser, USN (21 January 1943 - 22 March 1943) and including T/Lt.(j.g.) Marion L. Bohgren, USN (Mid 1944 - Early 1945) - which conflicts with DANFS and NavSource, both of which place Bohgren in command at commissioning.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1959
- Population
- Consolidated construction trades; wartime crew and officers (1943-45)
- Limitations
- Respected secondary compilation, not a primary record. The order date and the CO roster are carried as unverified corroboration; the first-commander conflict with DANFS/NavSource is unresolved and carried in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-04
-
[6]National Archives and Records Administration, Special List 44, by Ship Numbers: PC-1193 [other_primary]
- Locator
- Special List 44, PDF p. 67 (document page count), PC-1193 row: 1/21/1943-2/28/1945
- Finding type
- historical_record
- Finding
- The National Archives' Special List 44, by Ship Numbers, lists PC-1193 with deck-log coverage beginning 21 January 1943 (the commissioning date) and ending 28 February 1945. The entry supplies an archival lead for contemporaneous operational records for this hull covering the Miami patrol and escort period.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-01-21 to 1945-02-28
- Population
- U.S. Navy crew recorded in deck logs
- Limitations
- The list identifies deck-log coverage, not the contents of the logs. The underlying logs were not retrieved in this batch and are undigitized. Coverage ends 28 February 1945 - the post-February-1945 period, including the Naval Reserve Training service and Lake Ontario patrol duty (1946-1950), is not shown in this list. The entry does not establish asbestos presence, a specific exposure, or litigation facts.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-05
-
[7]National Archives, 'Researching Asbestos aboard US Naval Vessel up through 1961' (guided research topic) [other_primary]
- Locator
- Guide sections: General Information Books (RG 19 Entry P 12 Patrol Craft GIBs); Board of Inspection and Survey Reports (RG 38 Entry P 1-E); Cartographic Branch Hull Series S39 insulation and lagging drawings
- Finding type
- asbestos_application
- Finding
- The National Archives asbestos-research guide identifies Record Group 19 and RG 38 sources relevant to pre-1961 Navy-vessel asbestos research, including RG 19 Entry P 12 'Patrol Craft General Information Books [Item S-68], 1902-1955', RG 38 Entry P 1-E 'Patrol Craft Material Inspection Reports and Related Documentation, 1940-1978', ship and machinery specifications, and S39 'Insulation and Lagging' drawings within the Hull Series of ship engineering drawings arranged by hull number (paper series, plus the 1945-1955 microfilm series). The guide states that asbestos use in U.S. Navy materiel from 1941-1961 is a frequently requested research topic. These records are archival leads for possible hull-level material documentation, not evidence that asbestos was aboard PC-1193.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1961
- Population
- U.S. Navy vessels and shipyard records, generally through 1961
- Limitations
- This guide identifies record series and filing codes; it does not identify PC-1193, prove that any listed record survives for this hull, or establish asbestos content, quantity, location, disturbance, or exposure aboard this vessel.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-06
-
[8]Era inference built on: DANFS spec block (PC-461 class, 1942 steel-hulled diesel patrol craft); NavSource specifications (2 x Hooven-Owen-Rentschler R-99DA diesels, no steam plant); GAO HRD-80-2 Navy asbestos-era documentation (see ev-08) [other_primary]
- Locator
- DANFS spec block; NavSource specifications; GAO HRD-80-2 program documentation
- Finding type
- asbestos_application
- Finding
- A steel-hulled patrol craft built 1942 at a wartime U.S. yard sits inside the Navy's documented asbestos-use era; era-standard applications aboard a small diesel combatant of this type and period were thermal insulation and machinery/exhaust lagging in engineering spaces, gaskets and valve packing throughout the piping plant, and electrical insulation - in the confined hull volume characteristic of a 173-foot patrol craft. As a diesel-driven vessel she carried no boilers or steam turbines - the boiler/turbine lagging pathway of steam vessels does not apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1959
- Population
- Consolidated Shipbuilding construction trades (1942); crew (1943-46); Naval Reserve Training personnel (1946-50); Charleston availability repair trades (1943-45); scrappers at Hughes Brothers, Inc. (1959)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or builder's spec located for PC-1193. Names era-standard applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-07
-
[9]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 construction (1942), active service (1943-1946), Naval Reserve Training service (1946-1950), and reserve-fleet lay-up and sale (1950-1959).
- 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, confirmed 2026-10-03) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-08
-
[10]MARAD Vessel History Database (vesselhistory.marad.dot.gov), public search [marad_nrc]
- Locator
- ShipHistory/ShipList live keyword queries for PC-1193, PC 1193, Ridgway, and 1193; zero detail records returned
- Finding type
- historical_record
- Finding
- The U.S. Maritime Administration's Vessel History Database returns no record for 'PC-1193', 'PC 1193', 'Ridgway', or '1193' in live searches run this date. DANFS records the hull as sold to Hughes Brothers, Inc., 16 September 1959; the MARAD database negative is consistent with a direct Navy sale to a private scrapper leaving no MARAD custody trail.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 (search); 1959 (custody window)
- Limitations
- An empty database result is an absence-of-record finding, not proof the vessel never entered MARAD custody - the database documents vessels with status cards and may not capture hulls sold directly for scrap. It neither establishes nor defeats any fact about the scrapping location or process.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-09
-
[11]Batch-7689 search ledger (this record): DANFS transcription; NavSource; ShipbuildingHistory Consolidated yard table; uboat.net; ibiblio 'Ships of the U.S. Navy 1940-1945'; NARA Special List 44; NARA asbestos guide; GAO product page; MARAD VHDB; NVR; BGSU HCGL; CourtListener (blocked); secondary web litigation/name-collision sweeps [other_primary]
- Locator
- search_ledger rows sl-uss-ridgway-pc1193-01 through sl-uss-ridgway-pc1193-13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming PC-1193 or Ridgway was found in the public sources searched (see search_ledger). Secondary web sweeps surfaced only a law-firm jobsite page on the builder's yard (Consolidated Shipbuilding as a workplace) - an excluded source class - and no vessel content. CAVEAT: CourtListener could not be queried this session - the authenticated API returned a daily-quota response (wait ~9,828 s / ~2.7 h); logged as blocked in the 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 (quota-blocked, not run). NARA deck logs (RG 24, coverage to 28 February 1945), the RG 19 patrol-craft General Information Books and RG 38 InSurv reports, and any Consolidated build-contract specifications are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ridgway-pc1193-10