USS Humboldt (AVP-21)

Evidence

12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).

1. [1]research packet dw-packet.md (2 sources cited) [other_primary]

   Finding type

   vessel_history

   Finding

   Identity packet verdict: VERIFIED (queue spelling corrected

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Evidence ID

   uss-hunboldt-avp21-pkt-dw-packet-md

2. [2]DANFS, Humboldt (AVP-21), Naval History Division - verbatim HyperWar/ibiblio transcription (live NHHC page returned HTTP 404 on 2026-09-26 for humboldt, humboldt-avp-21, and uss-humboldt URL forms) [nhhc_danfs]

   Locator

   DANFS entry, specification line through disposition paragraph

   Finding type

   vessel_history

   Finding

   DANFS establishes the hull's identity and service: Humboldt (AVP-21), Barnegat class, named for the bay on the northern California coast; launched by Boston Navy Yard 1941-03-17 (sponsor Mrs. William T. Tarrant); commissioned 1941-10-07, Comdr. W. G. Tomkinson. Shakedown off the Atlantic coast; sailed Norfolk 1942-05-13 for Rear Admiral Ingram's South Atlantic Force, arriving Recife 1942-08-05 via San Juan and Trinidad to tend VP-83 patrol aircraft; supplied and repaired seaplanes, ferried aviation gasoline to outlying Brazilian air bases, and conducted antisubmarine patrol herself. On 1943-01-28 at Natal she hosted the conference between President Roosevelt (returning from Casablanca) and President Vargas of Brazil; established a new seaplane base at Aratu May 1943. Headed north 1943-07-01, arriving Boston 1943-07-17; sailed 1943-08-23 to carry supplies and parts to Fleet Air Wings in Newfoundland, Iceland, and Britain - often unescorted - into early 1944, with voyages to Casablanca. At Casablanca late May 1944 she went out to aid survivors of the torpedoed escort carrier Block Island and destroyer Barr and escorted Barr to safety; then carried an experienced submarine officer to rendezvous with Guadalcanal's hunter-killer group, which had captured U-505 on 4 June. Supply runs to Azores/North Africa squadrons until departing Norfolk 1945-03-22 for Brazil; Recife 1945-04-05, on station until Germany's surrender; sailed for Norfolk 1945-06-10. Moved to Philadelphia Navy Yard 1945-07-16 for conversion to a Press Ship; reclassified AG-121 1945-07-30 to serve as a broadcast and teletype center for correspondents in the final phase of the war against Japan - the war ended before conversion was completed. Arrived Orange, Texas 1945-11-22; decommissioned 1947-03-19 into the Atlantic Reserve Fleet; loaned to the Coast Guard January 1949, serving at Boston as a weather ship designated WHEC-372 (entry written during USCG service).

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-26

   Study period

   1940-1949 (entry currency)

   Population

   Crew (~367 per DANFS spec line; 254 per Shipscribe 1944); presidents and staffs during the 1943-01-28 Natal conference; Navy-yard workers at Boston (construction 1940-41; availability Jul-Aug 1943) and Philadelphia (press-ship conversion Jul-Aug 1945); inactivation crew at Orange TX

   Limitations

   Authoritative naval-history narrative for this hull; contains no asbestos, insulation-material, or hazmat content - supports identity, yard periods, and service timeline only, no asbestos claim. Live NHHC page unreachable (404); verbatim transcription mirror cited per batch-01 link-rot convention. Entry ends during USCG service ('now serves at Boston as a weather ship, designated WHEC-372'), so it predates the 1969 return and 1970 disposal.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-01

3. [3]Shipscribe (Stephen S. Roberts), U.S. Navy Auxiliary Ships class file, BARNEGAT (AVP-10) page - compiled from official Navy records (construction/disposition tables, CNO correspondence summaries, class design notes) [other_primary]

   Locator

   Class header (design/machinery/armament), Construction table row AVP-21, Disposition table row AVP-21, ship notes para. 21, class narrative press-ship paragraph

   Finding type

   historical_record

   Finding

   Shipscribe's compiled official data for class BARNEGAT (AVP-10) establishes: Navy AVP-10 design; displacement 1,766 light / 2,800 lim.; 311.7'oa x 41.1'e x 13.5'lim (lengths recorded as 311.5 for AVP 21-22); Fairbanks-Morse diesels, 2 screws, 6,080 hp, 18.2 kts; complement 254 (1944). Construction table for AVP-21: ordered 1940-06-12, builder NYd Boston, keel 1940-09-06, launched 1941-03-17, commissioned 1941-10-07. Disposition table: decommissioned 1947-03-19; strike column 1966-09-26 (the permanent USCG transfer date applied to all 18 loaned AVPs); disposal 1949-01-24 to USCG; fate USCG. Ship notes: 'In USN reserve 1946-49. To AG-121 30 Jul 45 (Press Ship, OPI No. 2, conversion begun at Philadelphia Navy Yard, cancelled 16 Aug 45 and reconverted), to AVP-21 10 Sep 45. To USCG as HUMBOLDT (WAVP-372). Sold 22 May 70.' Class narrative: three ships (AVP 21, 22, and one other) designated July 1945 for urgent conversion to press ships (AG 121-23) for the invasion of Japan - deckhouse on the boat deck aft of the stack plus facilities for voice transmission, radio teletype, and radio telephoto; need evaporated with Japan's surrender and they were reconverted to AVPs. Armament table places AVP-21 in the 3x5"/38 + 40mm class fit for 1943-44 (and later reduced fits 1944-51).

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-26

   Study period

   1938-1970 (class file coverage)

   Population

   Crew; Boston Navy Yard construction workers 1940-41; Philadelphia Navy Yard conversion workers Jul-Aug 1945

   Limitations

   Secondary compilation of official U.S. Navy auxiliary records (not the underlying documents themselves); class-narrative text says 'AVP 21, 22, and 27' for the AG 121-23 conversions but the file's own ship notes assign AG-123 to Rockaway (AVP-29) - '27' treated as a typo (see correction row). Strike column 1966-09-26 reflects permanent transfer, not the 1970 post-return striking NavSource records. Contains no asbestos content.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-02

4. [4]NHHC, Dictionary of American Naval Aviation Squadrons Vol. 2 (Roy A. Grossnick), Appendix 5 Seaplane Tender Listings and VP/VPB squadron chapters - official NHHC publication (afhso.af.mil digitization via archive.org; live content/dam PDF returned HTTP 404, batch-625) [nhhc_danfs]

   Locator

   Appendix 5 tender listing table row for hull 21; chapter text for VP-74 (Dec 1942 Natal), NAF Belem facility history (VP-94), VPB-211 (Apr 1945 Bahia Bay); NH-78793 photo caption; VPB-18 chapter 'Humboldt-class tenders' line

   Finding type

   historical_record

   Finding

   NHHC's Dictionary of American Naval Aviation Squadrons Vol. 2 (Grossnick), Appendix 5 'Seaplane Tender Listings' (p. 731ff), lists hull 21 Humboldt with commission/decommission dates 7 Oct 1941 / 19 Mar 1947, other designations 'AG 121 30 Jul 1945' and 'AVP 21 10 Sep 1945', and disposition 'Transferred to USCG 24 Jan 1949' - an official NHHC publication confirming the AG-121 window, the reversion date, and the 19 March decommissioning. Chapter text independently documents Humboldt's tender service: VP-74 received tender service from Humboldt on arrival at NAF Natal in December 1942; Humboldt (followed by Barnegat AVP-10) provided support for VP-94 at NAF Belem until shore facilities were completed; and VPB-211 was based aboard Humboldt at Bahia Bay in April 1945 for advanced-base seaplane-handling training. The volume also carries the official photo caption 'Humboldt (AVP 21) tending a PBM at Bahia, Brazil, April 1945, NH-78793' and, in the VPB-18 chapter, describes sister AVPs Yakutat (AVP-32) and Shelikof (AVP-52) as 'Humboldt-class tenders' - period/official usage of the class-level name for the AVP-21-follow-on design group.

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-26

   Study period

   1941-1949

   Population

   Crew and hosted squadrons (VP-74 Dec 1942, VP-94 at Belem, VPB-211 Apr 1945)

   Limitations

   Official NHHC reference work; verifies designation and squadron-service dates for this hull. Table is OCR-fragmented in the digitization but the Humboldt row values are unambiguous and cross-confirmed by DANFS and Shipscribe. The 'Humboldt-class' wording is the volume's own usage for sister AVPs - it does not change this hull's construction class (Barnegat per DANFS/Shipscribe). Contains no asbestos or material content.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-03

5. [5]NavSource Online Service Ship Photo Archive, USS Humboldt (AVP-21)/USCGC Humboldt (WAVP-372/WHEC-372) page 09/43/4321 - transcription of ship data, captured via search-index snippets (batch-625 capture; still blocked 2026-09-26) [other_primary]

   Locator

   Page chronology block, awards block, specifications block (via search-index snippets; direct fetch failed 2026-09-20 and 2026-09-26)

   Finding type

   vessel_history

   Finding

   NavSource's Humboldt page (captured via search-index snippets 2026-09-20; direct fetch blocked then and again 2026-09-26) records: laid down 1940-09-06 at Boston Navy Yard; launched 1941-03-17; commissioned 1941-10-07, 'CDR. William G. Tomlinson'; WWII service principally American Theater/South Atlantic; redesignated Miscellaneous Auxiliary (press ship) AG-121 1945-07-30; conversion canceled 1945-08-25; reverted to AVP-21; decommissioned 1947-03-17 (conflicts with the 03-19 of DANFS/Shipscribe/DANAS); Atlantic Reserve Fleet; loaned to USCG 1949-01-24; commissioned USCGC Humboldt (WAVP-372) 1949-03-29; redesignated high endurance cutter WHEC-372 1966-05-01; decommissioned 1969-09-30 and returned to US Naval custody; struck from the Naval Register 1970; final disposition scrapped in Italy. Awards list: American Defense Service Medal (Fleet clasp), American Campaign Medal, EAME Campaign Medal, WWII Victory Medal, National Defense Service Medal. Radio call sign NEJL.

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-20

   Study period

   1940-1970

   Population

   Navy crew 1941-47; USCG crew 1949-69

   Limitations

   Volunteer transcription site - used for chronology/awards corroboration, not as sole source for contested dates; its 1947-03-17 decommissioning and 1945-08-25 cancellation dates conflict with DANFS/Shipscribe/DANAS (see correction row). Direct fetch failed in both sessions; content captured via search-index snippets, so the page was not read in full. No asbestos content.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-04

6. [6]Naval Historical Center, Online Library of Selected Images, 'USS Humboldt (AVP-21), 1941-1949' photo captions (photos 19-N-49686, 19-N-49687, 80-G-265680, 19-N-78020, NH 46913, 19-N-110805/6/10) - verbatim HyperWar/ibiblio mirror of the NHC page [nhhc_danfs]

   Locator

   Photo captions 19-N-49686 (Boston NYd 23 Aug 1943), 19-N-78020 (Norfolk NYd 17 Nov 1944), 19-N-110805/110806/110810 (Norfolk NYd inclining experiment 13 Nov 1945); page text 'repair period at Norfolk'

   Finding type

   vessel_history

   Finding

   NHHC's Online Library of Selected Images (Naval Historical Center photo captions, HyperWar mirror) documents Navy-yard work periods on this specific hull: photo 19-N-49686 - 'Shown on 23 August 1943 upon completion of modifications at the Boston Navy Yard. During this upkeep period she received a third 5"/38 gun aft along with one quadruple and two twin 40-mm mounts' (Bureau of Ships Collection, U.S. National Archives); photo 19-N-78020 - 'Shown off the Norfolk Navy Yard on 17 November 1944. Her 5"/38 armament has been reduced to a single mount and her quadruple 40mm mount has been moved forward' (BuShips Collection); photos 19-N-110805/110806/110810 - 'Shown during an inclining experiment at the Norfolk Navy Yard on 13 November 1945' (BuShips Collection, USS Idaho BB-42 in background); the page text also records 'a repair period at Norfolk' before the April 1945 return to Brazil. These captions make the 1943 Boston modifications, a late-1944 Norfolk yard period, and a November 1945 Norfolk inclining experiment ship-specific documentation rather than class-level inference.

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-26

   Study period

   1943-1945

   Population

   Boston Navy Yard workers (Jul-Aug 1943 upkeep); Norfolk Navy Yard workers (Nov 1944 refit period; Nov 1945 inclining experiment); ship's crew during yard periods

   Limitations

   Official NHC photo captions from the Bureau of Ships collection - ship-specific documentation of yard work dates and scope (armament changes, inclining experiment). Contains no asbestos or material statement; documents that Navy-yard work occurred on this hull, not what materials were disturbed. Live NHHC equivalents not checked (standing NHHC link rot); the HyperWar mirror reproduces the NHC page verbatim (page dated 2000-12-26).

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-05

7. [7]Documented plant and yard-period record: Shipscribe Barnegat class file (machinery, construction, ship notes, armament fits) + DANFS service narrative + NHC Online Library photo captions (ev-05); inference framed per house convention against era sources (ev-07, ev-08) [other_primary]

   Locator

   Shipscribe class header machinery line and ship notes para. 21; DANFS yard-period dates; NHC photo captions 19-N-49686, 19-N-78020, 19-N-110805/6/10

   Finding type

   asbestos_application

   Finding

   Humboldt's documented plant and work history define the era-consistent asbestos inference space for this hull: a Navy-built diesel-driven seaplane tender (Fairbanks-Morse diesels, 2 screws, 6,080 hp - no boilers or steam turbines) constructed at Boston Navy Yard 1940-09-06 to 1941-10-07; a Boston Navy Yard upkeep/modification period ending 1943-08-23 during which she received a third 5"/38 gun and additional 40mm mounts (photo 19-N-49686 caption, ship-specific); a Norfolk Navy Yard period documented 1944-11-17 with armament reduced and relocated (photo 19-N-78020 caption) and a Norfolk repair period before the April 1945 Brazil return; a press-ship conversion begun at Philadelphia Navy Yard 1945-07-16 and cancelled/reconverted August 1945 (Shipscribe: cancelled 16 Aug; NavSource: 25 Aug); an inclining experiment at Norfolk Navy Yard 1945-11-13 (photos 19-N-110805/6/10); inactivation at Orange TX from 1945-11-22; and Coast Guard weather-ship conversion before commissioning as WAVP-372 1949-03-29 (balloon shelter, oceanographic and hydrographic winches per class-wide USCG description). For a 1940-41 diesel Navy hull the era-consistent asbestos applications are engine exhaust and muffler lagging, gaskets and packing in machinery and piping joints, electrical insulation, joiner/bulkhead fireproofing, and deck coverings - not boiler or steam-turbine insulation, which this plant did not carry.

   Verification

   inferred

   Role

   supporting

   Documentation level

   class_or_era

   Accessed

   2026-09-26

   Study period

   1940-1970

   Population

   Navy crew (~254-367); Boston Navy Yard workers (build 1940-41; 1943 availability); Philadelphia Navy Yard workers (Jul-Aug 1945 conversion/reconversion); USCG yard and crew 1949-69

   Limitations

   Era/design inference only - no ship-specific insulation schedule, survey, or material list was located for this hull or for the Barnegat class. The documented facts are the diesel plant and the dated yard/conversion periods; the asbestos content of any material aboard is unestablished. The diesel plant materially narrows the inference versus steam auxiliaries - no boiler or turbine insulation claim is made.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-06

8. [8]Corn, Jacqueline Karnell, and Jennifer Starr, 'Historical perspective on asbestos: Policies and protective measures in World War II shipbuilding,' American Journal of Industrial Medicine 11(3):359-373 [other_primary]

   Locator

   Article abstract and era summary

   Finding type

   asbestos_application

   Finding

   Peer-reviewed historical study documents that asbestos was used extensively as a fireproofing and insulating material in U.S. shipbuilding during WWII, and that wartime demand drove unprecedented asbestos utilization aboard Navy hulls - the era covering this hull's 1940-41 Boston Navy Yard construction, her 1943 Boston availability, and her 1945 Philadelphia Navy Yard conversion work.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-09-26

   Study period

   1939-1945 (study scope)

   Population

   Shipyard workers and crews of WWII-era U.S. Navy construction generally

   Limitations

   Program/era-level scholarly documentation of asbestos use in WWII shipbuilding generally; does not name this vessel and does not establish that asbestos was or was not aboard this hull, nor quantity, location, condition, exposure, or causation.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-07

9. [9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]

   Locator

   GAO product page description (full text returned HTTP 403 to automated fetch - standing defect from batch-01)

   Finding type

   gov_survey

   Finding

   GAO documented the Navy's asbestos-protection program and its insulation-removal policies - program-level confirmation that asbestos insulation was standard aboard Navy vessels of this ship's construction era and that the material later required managed removal. Humboldt's construction (1940-41), Navy service (1941-47), and Coast Guard conversion (1949) all fall within the pre-policy period GAO describes, in which insulation work was routine and largely uncontrolled.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-09-26

   Study period

   1930s-1979 (report scope)

   Population

   Navy shipyard and aboard-ship insulation workers, program-wide

   Limitations

   Yard/program-level documentation, not hull-specific; establishes the era's asbestos-insulation baseline for Navy-built vessels, not conditions aboard Humboldt. Does not establish what was installed, removed, or retained on this hull. Full text not retrieved (gao.gov 403); description-level reliance only.

   Atlas source

   true

   Evidence ID

   ev-uss-hunboldt-avp21-08

10. [10]CourtListener API v4 litigation sweep for this hull via cl-auth-search.py: name/designation queries 0 opinions; "Humboldt" AND asbestos = 28 collisions; "AVP-21" OR "AG-121" = 147 incidental collisions (page-1 review); docket query uncompleted (fleet pacing) [court_record]

    Locator

    search_ledger sl-uss-hunboldt-avp21-07

    Finding type

    litigation_documented

    Finding

    No qualifying litigation naming this hull. Authenticated CourtListener API v4 queries returned zero opinions for "USS Humboldt", "USCGC Humboldt", "WAVP-372", and "WHEC-372"; a "Humboldt" AND asbestos opinion query returned 28 hits, all name collisions - Humboldt County environmental/government matters (County of Humboldt v. WCAB 1983; Humboldt Baykeeper CWA litigation v. Union Pacific and v. Humboldt Waste Management Authority; Marbled Murrelet/Friends of the Eel River v. NCRA) and generic asbestos cases with incidental Humboldt references - none naming the vessel; and a combined hull-number opinion query "AVP-21" OR "AG-121" returned 147 hits whose first-page review (20 results) shows only incidental-string collisions (Bates/docket fragments in unrelated commercial litigation), none vessel-related. A "USS Humboldt" docket-type query could not be completed - the fleet-wide pacing budget (~114 req/hr shared across sessions) was spent on every attempt across ~90 minutes of spaced retries; left as an open lead rather than retried into a ban. Separately, web-index screens this session and in batch-625 found only law-firm marketing ship-lists enumerating AVP-21 - not evidence.

    Verification

    partial

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-09-26

    Study period

    1940-present (public record)

    Limitations

    Direct authenticated queries for every name/designation returned zero opinions; the asbestos+name sweep and hull-number sweep produced only name collisions - but the "USS Humboldt" docket-type query was never executed (fleet pacing persisted ~90 min) and the 147-hit hull-number result set was reviewed at page-1 depth only, so the sweep is not fully exhaustive. Absence of a located docket or opinion does not prove no asbestos exposure or claims occurred - it establishes only that no qualifying case naming the hull is indexed in CourtListener opinions as of 2026-09-26. PACER/state-court and MDL-875 docket coverage are outside this query set.

    Atlas source

    true

    Evidence ID

    ev-uss-hunboldt-avp21-09

11. [11]NARA Guide to Federal Records: RG 24 (Bureau of Naval Personnel - ship deck logs), RG 19 (Bureau of Ships); USCG Historian's Office cutter file series (HUMBOLDT 1949-USCG, WAVP-372/WHEC-372) [other_primary]

    Locator

    NARA record-group guides; USCG cutter index (2008 Wayback capture)

    Finding type

    historical_record

    Finding

    Archival leads (not retrieved - research-room or reproduction order required; no spend authorized): NARA RG 24 deck logs for AVP-21/AG-121 (1941-1947) including the July-August 1945 Philadelphia conversion period and the 1943-01-28 Natal conference dates; RG 19 Bureau of Ships records of the Boston Navy Yard construction (1940-41), the 1943 Boston availability, and the Philadelphia Navy Yard press-ship conversion (OPI No. 2) and reconversion work orders, which may carry material/work specifications; USCG records for the 1949 weather-ship conversion (balloon shelter, oceanographic/hydrographic winches) and WAVP/WHEC-372 cutter files - the USCG Historian's Humboldt cutter file exists (confirmed in the official cutter index) but history.uscg.mil blocked automated fetch on 2026-09-26.

    Verification

    unverified

    Role

    archival_lead

    Documentation level

    context_only

    Accessed

    2026-09-26

    Study period

    1940-1970

    Limitations

    Record-group mapping only - no box-level retrieval performed; existence of asbestos-specific documents for this hull is unknown until surveyed in person. Nothing in this row is an asbestos finding.

    Atlas source

    true

    Evidence ID

    ev-uss-hunboldt-avp21-10

12. [12]Shipscribe AVP-10 file (construction/disposition tables, ship notes, class narrative); DANFS Humboldt (HyperWar transcription); NHHC DANAS Vol. 2 App. 5 and VPB-18 chapter text; NavSource AVP-21 page (via index snippets); uboat.net warship entry (secondary, corroborating 17 Mar only); batch-625 primary record uss-humboldt-ag121.atlas.json [other_primary]

    Locator

    Shipscribe disposition table and ship notes para. 21; DANFS disposition paragraph; NavSource chronology block; DANAS Vol. 2 VPB-18 chapter (Tanapag/Saipan narrative); origin/batch-625/uss-humboldt-ag121

    Finding type

    historical_record

    Finding

    Source discrepancies and consolidation recorded for this hull: (a) decommissioning date - DANFS, Shipscribe, and NHHC DANAS Vol. 2 App. 5 give 1947-03-19; NavSource and uboat.net give 1947-03-17; 19 March adopted (three sources incl. two official), formally unresolved. (b) Press-ship conversion cancellation - Shipscribe ship notes give cancelled 1945-08-16; NavSource gives conversion canceled 1945-08-25; reversion to AVP-21 on 1945-09-10 (Shipscribe and DANAS agree). (c) Struck date - Shipscribe's disposition table carries 1966-09-26 (the permanent USCG transfer date applied to all 18 loaned AVPs); NavSource gives struck from the Naval Register 1970 after USCG return 1969-09-30; treated as transfer-vs-final-striking distinction. (d) CO name - DANFS 'Comdr. W. G. Tomkinson' vs NavSource 'CDR. William G. Tomlinson'. (e) Complement - DANFS 367 vs Shipscribe 254 (1944); kept separate. (f) Shipscribe class narrative 'AVP 21, 22, and 27' vs its own ship notes assigning AG-123 to Rockaway AVP-29 - class-text typo. (g) Upstream hull-list entry 'USS Hunboldt (AVP-21)' verified as a misspelling of this same hull - AVP-21 is a unique hull number and no second Humboldt/Hunboldt hull exists in Navy records - and consolidated with the primary record uss-humboldt-ag121 (batch-625): one physical vessel under two list entries, not an additional hull. (h) 'Humboldt class' labeling: batch-625 described the term as denoting the AG-121/122/123 press-ship conversion group only; DANAS Vol. 2 (official NHHC, VPB-18 chapter) in fact calls sister AVPs Yakutat and Shelikof 'Humboldt-class tenders,' so the term also has documented Navy usage for the AVP-21-follow-on design group - the construction class remains Barnegat (AVP-10) per DANFS and Shipscribe.

    Verification

    verified

    Role

    correction

    Documentation level

    ship_specific

    Accessed

    2026-09-26

    Study period

    1940-1970

    Limitations

    Resolves publication-level discrepancies among authoritative and compiled sources and records the two-list-entry consolidation; none affects identity, the AG-121 window, or the asbestos posture materially. Decommissioning and cancellation dates remain formally unresolved pending a primary deck log or BuShips record. No asbestos content in any discrepancy.

    Atlas source

    true

    Evidence ID

    ev-uss-hunboldt-avp21-11