Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
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[1]DANFS, Mayo (DD-422) (verbatim transcription; live NHHC page 404 - see search_ledger) [nhhc_danfs]
- Locator
- hazegray DANFS transcription for DD-422 (Wayback capture 2010-10-28); live NHHC URL patterns 404
- Finding type
- vessel_history
- Finding
- DANFS record for this hull: laid down 16 May 1938 by Bethlehem Shipbuilding Corp., Fore River, Mass.; launched 26 March 1940, sponsored by Mrs. C. G. Mayo, daughter-in-law of Admiral Mayo; commissioned 18 September 1940, Lt. C. D. Emory in command. Spec block: 1,620 t; 374 ft 4 in; 36 ft 1 in; 11 ft draft; 37+ kt; complement 191; 5 x 5 in, 8 x 20 mm, 5 x 21 in torpedo tubes, 2 depth-charge throwers; Benson class. Service: Neutrality Patrol; escorted Marines to Iceland July 1941; patrolled off Argentia during the Atlantic Charter August 1941; Boston convoy escort, then New York fast troop transports from summer 1942; removed 247 survivors from burning transport Wakefield 3 September 1942; Casablanca 12 November 1942; DesRon 7 joined 8th Fleet August 1943; Salerno 8 September 1943; Anzio 22-24 January 1944 - explosion at 2001 on 24 January (reported as a mine) killed seven and wounded 23; temporary patch at Naples; tow home from 3 March; New York Navy Yard April 1944, four months of repairs; one Trinidad voyage and four to Europe; DesRon 7 sortied New York 5 May 1945; TG 12.4 Wake Island strike 20 June; Ulithi; Okinawa escort missions; occupation troops landed Honshu 2 September; departed Yokohama November 1945; arrived Charleston 7 December 1945; decommissioned 18 March 1946 into reserve at Orange, Tex., 'where she remains into 1969'; two battle stars.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1938-1969
- Population
- Bethlehem Quincy construction trades 1938-40; wartime crew (design complement 191)
- Limitations
- DANFS documents service history and specifications, not materials or asbestos content. The entry ends in 1969, so striking and sale are not covered by this source (carried from secondary reads - see gaps). OCR of the hazegray transcription garbles the New York arrival date (';3 April' vs secondary 5 April) and the speed figure; wounded count reads 23 vs 25 in secondary sources - conflicts logged in gaps. Live NHHC DANFS pages 404; verbatim hazegray transcription via 2010-10-28 Wayback capture cited.
- Atlas source
- true
- Evidence ID
- ev-uss-mayo-dd422-01
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[2]General Information Book, Destroyers DD421 and DD422, U.S.S. Benson and Mayo - Office of Supervisor of Shipbuilding, U.S.N., Bethlehem Steel Company, Quincy, Mass., 1940 (11-page excerpt hosted by the Destroyer History Foundation) [other_primary]
- Locator
- DHF PDF excerpt, cover page + Sections A-1/A-5 (machinery table p.3, dimensions p.4); retrieved and OCR'd 2026-09-27
- Finding type
- historical_record
- Finding
- Ship-specific primary document naming this hull: the BuShips-cognizance General Information Book covers DD-421 and DD-422 jointly with per-hull data columns. Its propelling-machinery table documents for these hulls: 4 Babcock & Wilcox Express boilers at 618 psi designed working pressure; Bethlehem Steel Co. turbines (high-pressure impulse, low-pressure reaction, astern impulse sets); two shafts with 11 ft 3 in three-blade propellers; 50,000 shp designed total. Per-hull hull dimensions list DD-422 length overall 347 ft 10 in, LBP 340 ft 8-5/8 in, molded breadth 35 ft 9-1/4 in. Sections excerpted are A-1 (General) and A-5 (Ordnance); OCR of all 11 pages finds no insulation, lagging, or asbestos-material statement.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1938-1940 (document date 1940)
- Population
- Bethlehem Quincy construction trades 1938-40; crew 1940-46
- Limitations
- Documents as-built machinery and hull data for this hull; contains no asbestos or insulation content in the excerpted sections - the full GIB (additional sections not excerpted by DHF) may hold material specifications and remains the archival lead (ev-06). Does not establish asbestos aboard or any exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-mayo-dd422-02
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[3]U.S. Naval Institute, Naval History Magazine, 'Voyage to War' (August 2017); corroborating secondary reads: Destroyer History Foundation USS Mayo (DD-422) page, NavSource DD-422 photo index, Wikipedia/USS Mayo [reputable_press]
- Locator
- USNI article (commissioning scene, trials speed); destroyerhistory.org/benson-gleavesclass/ussmayo/; navsource.org/archives/05/422.htm
- Finding type
- vessel_history
- Finding
- Secondary corroboration for details DANFS does not carry: commissioned 18 September 1940 moored at Charlestown Navy Yard, LCDR Campbell Dallas Emory reading orders before 167 plank owners; builder's trials measured-mile run at 37.89 knots; reported for duty with DesDiv 13, DesRon 7 on 9 December 1940; nicknames 'Mighty Mayo' and 'Mayo Maru'; anchored in Tokyo Bay in view of USS Missouri for the 2 September 1945 surrender ceremony (DHF); post-war: stricken from the Naval Vessel Register 1 December 1971 and sold 8 May 1972 to Southern Scrap, New Orleans, for breaking up (Wikipedia/uboat.net reads).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1940-1972
- Population
- Wartime crew; occupation-era crew 1945-46
- Limitations
- Secondary sources used for corroboration and for events outside the DANFS entry's 1969 cutoff (striking, sale). Strike date conflicts: Wikipedia/uboat.net read 1 December 1971; NavSource and NavalCoverMuseum read 1 December 1972 - internally inconsistent with the documented 8 May 1972 sale; the class profile read 12.1970. Wounded count reads 25 vs DANFS 23; Yokohama departure reads 5 November vs DANFS 3 November. All conflicts logged in gaps. No asbestos content in any of these sources.
- Atlas source
- true
- Evidence ID
- ev-uss-mayo-dd422-03
-
[4]Class/era inference basis: DANFS-type specifications (4 high-pressure superheated boilers, geared turbines, twin screws, 50,000 h.p.); BuShips Ships' Data U.S. Naval Vessels Jan 1945 'No. 421 Class' machinery table; Atlas shipyard dataset records for bethlehem-shipbuilding, fore-river-shipyard, and brooklyn-navy-yard (all evidence_tier 3) [other_primary]
- Locator
- DANFS spec block (ev-01); class profile benson-gleaves-class.class.json machinery/propulsion entries; shipyards.json records
- Finding type
- asbestos_application
- Finding
- Era/class inference: a Benson-class destroyer built 1938-40 at Bethlehem Quincy with a four-boiler superheated steam plant would have carried period-standard asbestos insulation on boilers, turbines, and steam lines, plus flange and valve gaskets, machinery packing, and fireproofing. The builder yard is a tier-3 documented asbestos yard in the Atlas dataset; the hull's documented April-July 1944 repair availability at the New York Navy Yard (tier-3 yard) is a ship-specific yard event at a documented yard.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-27
- Study period
- 1938-1946
- Population
- Bethlehem Quincy construction trades 1938-40; New York Navy Yard repair workforce April-July 1944; crew 1940-46
- Limitations
- Class/era and builder-yard inference only - no ship-specific material schedule, survey, or abatement record establishes asbestos aboard this hull. Yard-event documentation speaks to the yard's documented asbestos environment, not to this hull's materials. Does not establish quantity, location, or present-day presence (hull scrapped 1972). BuShips 1945 table reads 47,000 shp for the lead ship vs 50,000 shp in the GIB and DANFS-type summaries - documented discrepancy, not asbestos-relevant.
- Atlas source
- true
- Evidence ID
- ev-uss-mayo-dd422-04
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[5]CourtListener API v4 sweeps, 2026-09-27, authenticated via fleet helper: 'USS Mayo' opinions 0 hits; 'USS Mayo' dockets 0 hits; 'DD-422' opinions 1 hit; 'DD-422' dockets 20 hits - all reviewed for vessel relevance [court_record]
- Locator
- CourtListener search API, type=o and type=r, 2026-09-27; docket hit at /opinion/7558976/
- Finding type
- litigation_documented
- Finding
- No qualifying asbestos litigation naming USS Mayo or DD-422 located. The single 'DD-422' opinion hit (Fletcher v. Liberty National Bank & Trust Co. of Louisville, 349 So. 2d 652, Fla. Dist. Ct. App. 1977) is a probate dispute whose docket number happens to be 'No. DD-422' - a name collision, not the vessel. All 20 'DD-422' docket hits and all 16 'Mayo asbestos destroyer' docket hits are string collisions; none names the ship. 'aboard the Mayo' produced zero opinion hits. Open-web asbestos searches return only law-firm/marketing listicle entries naming DD-422 in generic ship lists - banned sources, excluded. No survey, abatement contract, hazmat disclosure, or museum record names this hull (no museum - scrapped 1972).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 2026-09-27
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard or absence of claims - RECAP coverage is not exhaustive and MDL-875 complaint exhibits may name hulls in attachment text not indexed. The 'U.S.S. Mayo' variant query was fleet-paced at write time; it tokenizes identically to 'USS Mayo' (already zero hits), so residual risk is low - see search_ledger sl-08.
- Atlas source
- true
- Evidence ID
- ev-uss-mayo-dd422-05
-
[6]Archival leads: complete General Information Book DD-421/DD-422 (full volume beyond the 11-page DHF excerpt; original GIBs are BuShips/Supervisor of Shipbuilding records in NARA custody) + NARA RG 24 deck logs and RG 38 war diaries for DD-422 [other_primary]
- Locator
- DHF records catalog (421benson_GIBook.pdf excerpt note); catalog.archives.gov
- Finding type
- historical_record
- Finding
- Hull-level material documentation may exist in the complete General Information Book for DD-421/DD-422 - the retrieved DHF excerpt covers only Sections A-1 (General) and A-5 (Ordnance); insulation, piping, and machinery-space material sections of the full book, if present, were not excerpted. NARA holds DD-422 deck logs (RG 24) and WWII war diaries (RG 38); neither is digitized for this hull.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-27
- Study period
- 1938-1946 (record coverage); 2026-09-27 (lead logged)
- Limitations
- Leads only - contents unreviewed; no spend authorized for retrieval in this batch. The GIB excerpt itself is retrieved (ev-02) but the residual sections are speculative as to insulation content.
- Atlas source
- true
- Evidence ID
- ev-uss-mayo-dd422-06