Evidence
7 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-7).
-
[1]NavSource Online, Mine Warfare Vessel Photo Archive - 'Caution (MSF 158) ex-AM-158, ex-AMc-135' page 11/02158 (navsource.net mirror fetched live HTTP 200 this session; navsource.org DNS unresolvable, same as canonical record) [other_primary]
- Locator
- NavSource 11/02158 - page heading ('ex-AMc-135') + 'Admirable Class Minesweeper' chronology block
- Finding type
- vessel_history
- Finding
- NavSource designation chronology for this hull: 'Originally planned as Coastal Minesweeper, Caution (AMc 135). Reclassified as a Minesweeper, AM-158, 21 February 1942. Laid down 23 May 1942 by the Willamette Iron and Steel Corp., Portland, OR. Launched 7 December 1942. Commissioned USS Caution (AM 158), 10 February 1944.' The Willamette contract was thus an AMc-designated order redesignated to the Admirable-class fleet-minesweeper program three months before keel-laying; the AMc-135 number was never carried by a ship in service.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 1941-1945
- Population
- Willamette Iron & Steel construction trades (1942-44); USN crew 1944-45 (complement 104)
- Limitations
- Volunteer-compiled archival page - the sole primary-source-grade authority located for the AMc-135 designation and the 21 Feb 1942 redesignation date; the official DANFS entry is silent on the AMc designation entirely (ev-02). Corroborated by the uswarships.jounin.jp AMc index ('Caution | AMc-135 | Willamette Iron & Steel Corp. | ... 1942/2/21 -> AM-158') - secondary reference used for corroboration only, not cited as evidence. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-01
-
[2]DANFS, 'Caution' entry (AM-158) - verbatim transcription fetched live HTTP 200 this session; live NHHC page history.navy.mil/research/histories/ship-histories/danfs/c/caution.html returns 404 (standing link rot, same as BATCH-01); official text verified verbatim in the canonical record from a 2021-07-23 Wayback capture of the live NHHC page, with the hazegray mirror (Wayback 2024-06-18) corroborating [nhhc_danfs]
- Locator
- DANFS 'Caution' entry - specification block + full service narrative (ibiblio HyperWar mirror ships/dafs/AM/am158.html)
- Finding type
- vessel_history
- Finding
- The official DANFS entry knows this hull only as AM-158: 'Caution (AM-158) was launched 7 December 1942 by Willamette Iron and Steel Corp., Portland, Oreg.; commissioned 10 February 1944, Lieutenant Commander F. G. Crane, USNR, in command; and reported to the Pacific Fleet.' The entry contains no mention of AMc-135 or any pre-construction designation - the AMc-135 contract identity rests on NavSource (ev-01) and secondary-index corroboration, not on the official DANFS text. Service narrative: Pearl Harbor-Majuro-Eniwetok convoy escort to 1 Aug 1944; Saipan arrival 25 Aug 1944, Saipan-Tinian Patrol and Escort Group; Eniwetok-Portland overhaul from 5 Apr 1945; Cold Bay arrival 11 Jul 1945; decommissioned 16 Aug 1945 and transferred under lend-lease to the Soviet Union; reclassified MSF-158 7 Feb 1955.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 1942-1955
- Population
- Willamette Iron & Steel construction trades (1942-44); wartime crew (design complement 104), Pacific Fleet 1944-45
- Limitations
- DANFS documents the built hull's identity and service narrative - not the AMc designation chain and not materials or asbestos content; the entry contains no materials statement and no laid-down date. The ibiblio mirror prints 'AM-168' and 's. 16 k.' in the spec block - transcription artifacts; the official Wayback capture prints AM-158 and 15 k. (flagged in canonical ev-08). 'In whose custody she remains' reflects the entry's writing date (hull scrapped USSR 1960).
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-02
-
[3]Atlas canonical record uss-caution-am158.atlas.json (branch batch-1182/uss-caution-am158, Tier 2, researched 2026-09-22) + designation-chain rows ev-01 (NavSource) and ev-02 (DANFS) of this record [other_primary]
- Locator
- uss-caution-am158.atlas.json (canonical, 11 evidence rows, 14 ledger rows); this record's evidence rows ev-01, ev-02; hull-list-verify master-hull-list.json
- Finding type
- vessel_history
- Finding
- All-tier consolidation: AMc-135 and AM-158 are one contract hull, not two vessels. The master-hull-list row 'USS Caution / AMC-135 / Coastal Minesweeper / Admirable / WWII / tier 2' resolves to the canonical record uss-caution-am158 (Tier 2), which carries the full service history (commissioned 10 Feb 1944; Pearl Harbor-Marshall Islands convoy escort; Saipan-Tinian Patrol and Escort Group; Portland overhaul Apr-Jul 1945; decommission and Project Hula transfer to the USSR at Cold Bay 16 Aug 1945 - 17 Aug per Russell's NHHC appendix; Soviet service as T-284, training vessel Nov 1945, BRN-36 Dec 1956; scrapped 1960; MSF-158 7 Feb 1955; struck 1 Jan 1983), the NARA archival leads, the documented source conflicts, and the era/type asbestos inference. This record exists so the former designation resolves to the canonical hull rather than reading as a second vessel.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 1941-1983
- Limitations
- Internal consolidation statement - asserts only the one-hull identity, itself supported by the NavSource/DANFS rows ev-01/ev-02 and the canonical record's evidence chain; the underlying service history and asbestos assessment are the canonical record's and are not duplicated here.
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-03
-
[4]NARA, Special List 44 - Named Vessels (finding aid to Vessel and Station Log Books, RG 24; fetched live HTTP 200 this session) + NARA 'Researching Asbestos aboard US Naval Vessels up through 1961' guided-topic page (archives.gov/research/military/navy/guided-topics/asbestos, HTTP 200 this session) [other_primary]
- Locator
- Special List 44 named-vessels table, 'Caution (AM-158) 2/10/1944 8/16/1945' row; archives.gov asbestos guided topic, 'General Information Books' and 'Ship Engineering Drawings' sections
- Finding type
- historical_record
- Finding
- All federal archival records for this hull are indexed under AM-158, not the AMc designation: NARA Special List 44 indexes the hull as 'Caution (AM-158)' with logbook coverage 2/10/1944-8/16/1945 - the full commission, commissioning to Cold Bay decommissioning; a page-wide check of the index returns no AMc-135 (or any AMc) entry. NARA's asbestos-research guide identifies the series that would hold hull-level material specifications: RG 19 Entry P-11 'Minesweeper and Minelayer General Information Books [Item S-68], 1940-1962' and the hull-number-arranged Ship Engineering Drawings under the S filing codes - 'S103-Booklets of General Plans, S39-Insulation and Lagging, and sometimes S48-Piping.' Any researcher tracing 'AMc-135' must search the archive as AM-158.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 1944-1945 (logbook coverage); guide current as of 2026-09-22
- Population
- USN complement aboard the built hull, Feb 1944 - Aug 1945
- Limitations
- Archival lead only - documents which series exist and under which hull number, not that hull-specific material survives in them; the guide itself notes GIB coverage is incomplete per ship (sister-ship volumes may fill gaps) and that S39/S48 drawings are relatively rare in the paper series. No drawing or GIB was retrieved or confirmed. Deck logs are operational records, not materials documentation.
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-04
-
[5]CourtListener API v4 (authenticated) - this-session designation/name queries 'AMC-135' and 'USS Caution' blocked by shared throttle; canonical same-day sweep 2026-09-22 (uss-caution-am158 ledger) fully blocked, zero queries completed [court_record]
- Locator
- search_ledger rows sl-uss-caution-amc135-06 through sl-uss-caution-amc135-08; canonical record search_ledger sl-uss-caution-am158-08 through sl-uss-caution-am158-10
- Finding type
- historical_record
- Finding
- No qualifying asbestos litigation naming this hull under any designation was located - and the sweep is INCOMPLETE at both levels: (a) the canonical record's same-day authenticated sweep (2026-09-22) completed zero queries - API v4 returned HTTP 429 on the first call (shared 2800/day cap exhausted by parallel batch runs, retry-after ~2.7h), the public web index returned CloudFront 403, and the feeds endpoint returned 403; all planned variants ('USS Caution', 'AM-158', 'AMc-135'/'AMC-135', 'aboard the Caution', 'T-284'+minesweeper, RECAP docket sweeps) were logged BLOCKED unrun; (b) this session's own authenticated queries 'AMC-135' (type=o) and 'USS Caution' (type=o) both returned HTTP 429, retry-after ~10,100s - logged blocked in sl-06/sl-07 rather than retried into a ban. Sister-hull precedent: completed sweeps for Admirable AM-136 (batch-1169), Eagle AM-132 (batch-1165), and Bombard AM-151 (batch-1175, partial) returned zero qualifying litigation - consistent with the expected result but NOT a substitute for completing the sweep.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 2026-09-22
- Limitations
- Negative finding from index search is not proof no claim was ever filed - CourtListener coverage skews to digitized federal opinions and RECAP dockets; state-court filings and non-digitized dockets are underrepresented. The AMc-135/AMC-135 designation strings and every commissioned-name variant remain unrun on every surface (API 429; web index/feeds 403) - an open task for a future pass, recorded honestly, not rounded up to 'no litigation.' Establishes only that no qualifying case was located in completed searches - of which there were none this session.
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-05
-
[6]DANFS AM-158 entry (vessel type, builder, 1942 construction) + NavSource propulsion data (diesel plant) - era/type assessment maintained at uss-caution-am158 ev-06, era-level citations (Corn & Starr 1987; Fleischer et al. 1946, PMID 21016030) at ev-07 [nhhc_danfs]
- Locator
- NavSource 11/02158 propulsion line ('two 1,710shp ALCO 539 diesel engines, Farrel-Birmingham, single reduction gear, two shafts'); DANFS construction/service dates; canonical rows ev-uss-caution-am158-06, ev-uss-caution-am158-07
- Finding type
- asbestos_application
- Finding
- Era/type inference for the physical hull - built as AM-158, a steel Admirable-class fleet minesweeper at Willamette Iron & Steel, Portland, 1942, during the period when asbestos supply was federally reserved for shipbuilding - plausibly carried period-standard asbestos-containing materials in applications typical for the type: exhaust-system and muffler lagging, machinery gaskets and packing, electrical-cable insulation, accommodation/galley joiner insulation, winch/windlass and minesweep-gear brake linings, and deck composition. Because the plant was diesel direct-drive (two ALCO 539 engines, Farrel-Birmingham single reduction gear, no boilers or steam distribution), the dominant WWII asbestos pathway aboard steam vessels - boiler and steam-line lagging - did not exist on this hull, and the era inference is correspondingly weaker. This inference applies identically here because AMc-135 is the same hull's pre-construction designation.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-22
- Study period
- 1942-1960
- Population
- Willamette construction trades (1942-44, incl. the Apr-Jul 1945 pre-transfer overhaul at an unidentified Portland yard); U.S. crew 1944-45; Cold Bay transfer personnel (Navy Detachment 3294); Soviet crew 1945-60
- Limitations
- Inference from documented design, machinery type, and construction era - NOT a hull materials record. No survey, specification, or material schedule naming Caution, AM-158, AMc-135, T-284, or BRN-36 was located; establishes no asbestos content, quantity, location, condition, individual exposure, or causation. Applies to the built hull AM-158; the AMc-135 designation itself carried no ship and so has no asbestos history of its own. The hull was scrapped in the USSR in 1960 - no present-day survey pathway exists.
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-06
-
[7]Atlas shipyard dataset record 'willamette-iron-steel' (shipyards.json): Willamette Iron & Steel Corporation, Portland, OR (aliases WISCO, Willamette Shipyard), WWII peak employment 12,000, evidence_tier 3, asbestos_products_documented 'Pabco (Fibreboard)' [other_primary]
- Locator
- shipyards.json record 'willamette-iron-steel' (evidence row ev-willamette-01, verification_status 'disputed'); Lineaweaver v. Plant Insulation Co., 31 Cal. App. 4th 1409 (1995)
- Finding type
- asbestos_application
- Finding
- Builder-yard context: the Atlas shipyards dataset carries Willamette Iron & Steel - the contract holder for the AMc-135 order and builder of the hull as AM-158 - at evidence_tier 3 with one yard-level asbestos finding: 'Pabco (Fibreboard) used as fill-in insulation on ships at Willamette in the 1960s and 1970s' (Lineaweaver v. Plant Insulation Co., 31 Cal. App. 4th 1409, 1995). WWII peak employment 12,000.
- Verification
- partial
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-22
- Study period
- 1942-1944 (construction window); finding covers 1960s-1970s
- Population
- Willamette Iron & Steel trades, 1941-1945 peak (this hull's construction window as AM-158)
- Limitations
- Yard-level documentation, not a hull record - and weaker than usual: the documented finding covers 1960s-70s repair work, roughly two decades after this hull's 1942-44 construction, and the dataset itself flags the finding 'disputed' (the opinion names only 'Willamette Shipyard'; identification as Willamette Iron & Steel of Portland is an inference the source does not make). Establishes nothing about materials aboard this hull; carried so the yard link is transparent, not as exposure evidence.
- Atlas source
- true
- Evidence ID
- ev-uss-caution-amc135-07