USS SC-643

Name
USS SC-643
Hull designation
SC-643
Vessel class
SC-497
Evidence tier
—
Evidence entries
5
Record ID
uss-sc-643-sc643
Dataset version
2026.10.12-rc.1
Canonical URL
https://asbestosatlas.org/ships/uss-sc-643-sc643

Evidence

5 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-5).

  1. [1]research packet 919-packet.md (3 sources cited) [other_primary]
    Finding type
    vessel_history
    Finding
    Identity packet verdict: PHANTOM
    Verification
    verified
    Role
    negative_finding
    Documentation level
    ship_specific
    Evidence ID
    uss-sc-643-sc643-pkt-919-packet-md
  2. [2]HyperWar, 'Ships of the U.S. Navy, 1940-1945,' SC Submarine Chasers (Wooden Hull) table [other_primary]
    Locator
    SC Submarine Chasers (Wooden Hull) table, SC-628-669 range
    Finding type
    vessel_history
    Finding
    Range-level ship-list evidence places SC-643 within the wooden-hulled SC submarine-chaser listing, in the SC-628-669 sequence. The listing supports hull identity and class grouping only; it supplies no individual narrative, crew figure, material record, or asbestos information for SC-643.
    Verification
    verified
    Role
    context
    Documentation level
    class_or_era
    Accessed
    2026-10-03
    Study period
    1940-1945
    Limitations
    Range-level roster evidence only. It does not establish individual construction dates, a PC-461 identity, operations, transfer, disposition, materials, asbestos presence, exposure, quantity, or legal eligibility.
    Atlas source
    true
    Evidence ID
    ev-uss-sc-643-sc643-01
  3. [3]Bureau of Ships, Ships' Data 1945, volume II (Shipscribe mirror), SC-497-type machinery/specification tables [other_primary]
    Locator
    SC submarine-chaser machinery/specification tables
    Finding type
    asbestos_application
    Finding
    Class/era inference: a WWII small diesel submarine chaser may have used insulation or lagging around diesel machinery and exhaust systems, gaskets, packing, and electrical insulation. These are possible era-standard applications, not documented materials aboard SC-643.
    Verification
    inferred
    Role
    supporting
    Documentation level
    class_or_era
    Accessed
    2026-10-03
    Study period
    World War II era
    Population
    Possible construction, maintenance, and crew populations for SC-497-class craft
    Limitations
    Class/era inference only. No insulation survey, material list, work package, or other source identifies any asbestos-containing product aboard SC-643. No quantity, individual exposure, or present-day condition is established.
    Atlas source
    true
    Evidence ID
    ev-uss-sc-643-sc643-02
  4. [4]CourtListener API v4 authenticated helper, cl-auth-search.py; fleet pacing response [court_record]
    Locator
    2026-10-03 helper stderr: 'COURTLISTENER PACING: the fleet-wide request budget is momentarily spent'
    Finding type
    litigation_documented
    Finding
    No qualifying ship-specific asbestos litigation result is recorded. The required authenticated CourtListener sweep did not execute: the helper rejected the first base query, exact-name opinion search for USS SC-643, because the fleet-wide pacing budget was momentarily spent. The remaining base queries were not sent, so litigation status remains open rather than negative.
    Verification
    partial
    Role
    negative_finding
    Documentation level
    ship_specific
    Accessed
    2026-10-03
    Study period
    2026-10-03
    Limitations
    This is a procedural negative finding, not a litigation negative: no search result was returned and no conclusion about litigation, exposure, causation, products, or legal eligibility may be drawn. No anonymous or non-helper CourtListener request was made.
    Atlas source
    true
    Evidence ID
    ev-uss-sc-643-sc643-03
  5. [5]Batch-8018 search ledger for USS SC-643 [other_primary]
    Locator
    search_ledger rows sl-uss-sc-643-sc643-01 through -05
    Finding type
    historical_record
    Finding
    No ship-specific asbestos record was located in the sources reviewed: no survey, abatement record, hazmat disclosure, material list, or qualifying litigation result is retained for USS SC-643. The public record used here remains class/era or range-level only.
    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. CourtListener is incomplete because fleet pacing prevented execution; archival personnel and technical records remain leads. This finding does not establish or defeat exposure, causation, or legal eligibility.
    Atlas source
    true
    Evidence ID
    ev-uss-sc-643-sc643-04

Attribution

Compiled by
Paul Danziger; Rod de Llano
Publisher
Danziger & De Llano, LLP
License
CC-BY-4.0
Citation
Danziger, P., and De Llano, R. (2026). AsbestosAtlas Navy Vessel Asbestos Exposure Dataset. Danziger & De Llano, LLP. DOI: not yet assigned
Dataset version
asbestosatlas-ships-2026.10.12-rc.1
DOI
not yet assigned