Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 850-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: UNVERIFIABLE
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Evidence ID
- uss-built-in-denmark-as-msi12-pkt-850-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, MSI-12 - construction as U.S. MDAP hull, delivery to Royal Danish Navy as Sandvig (M 581), milestones, specifications (verified live 2026-10-03) [other_primary]
- Locator
- NavSource MSI-12 page (archives/11/0512.htm), header block, class line, and specifications block
- Finding type
- vessel_history
- Finding
- Documented for this hull: 'MSI-12 was built in Denmark. MSI-1 Class Inshore Minesweeper: Laid down 22 April 1959 as MSI-12 under the Mutual Defense Assistance Program by the Naval Dockyard, Copenhagen, Denmark; Launched 1 March 1961; Commissioned Sandvig (M 581), 1 February 1962; Decommissioned 30 August 1974, sold and converted to a private yacht; Fate unknown.' Specifications: displacement 193 t; length 114'; beam 22'8"; draft 7'6"; speed 13.1 kts; complement 20; armament two Mk M/42 twin 20mm mounts (reduced in 1963 to one Mk M/42 20mm mount); propulsion two 1,100hp Werkspoor diesel engines, two shafts. Page notes 'There is no DANFS history currently available for MSI-12.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1976
- Population
- Orlogsværftet construction trades (1960-61); Royal Danish Navy crew (1962-74)
- Limitations
- Volunteer secondary compilation, not a registry - milestone dates track the Danish national record except the laid-down date, which conflicts (NavSource 22 April 1959 is Asvig/MSI-11's keel date, propagated here; Danish record gives 11 May 1960 - see gaps and ev-02). 'Sold and converted to a private yacht / fate unknown' is partially superseded: the Danish service record carries the 27 August 1976 sale to Ross & Sons and a 2006 Mediterranean photograph (ev-03). No asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-01
-
[3]navalhistory.dk (Johnny E. Balsved), SANDVIG (1962-1974) data sheet - builder, milestones, specifications, 2006 post-service photograph (Wayback capture 2024-06-23; live page returned HTTP 503 at fetch time - cited as archived) [other_primary]
- Locator
- SANDVIG data sheet, specifications block and 'More Photos' caption (Wayback capture 20240623143945)
- Finding type
- vessel_history
- Finding
- Danish national naval record for this hull: built by Naval Dock Yard, Copenhagen; laid down May 11, 1960; launched March 1, 1961; commissioned February 1, 1962; pennant M581, international call sign OVEM; displacement 193 tons; LOA 34.75 m / LWL 31.86 m, beam 6.93 m, draught 2.30 m; complement 20 (3 officers and 17 ratings); 2 Werkspoor diesel engines 1,100 hp, 2 propellers; range 2,000 nm at 9 knots; armament 2 x 20mm Machine Gun Mk M/42 LvSa2 (1x2), from 1963 one 20mm Mk M/42 LvSa; speed 13.1 knots. Notes: 'Non-magnetic minesweeper designed for mine sweeping in shallow waters. Almost the same look and design as the Dutch VAN STRAELEN Class.' Photo caption documents 'The former minesweeper SANDVIG... as a Spanish cruise vessel in the Mediterranean in 2006.' Cited source: Olsen & Storgaard, Flådens skibe og fartøjer 1945-1995 (1998).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1960-2006
- Population
- Orlogsværftet construction trades (1960-61); Royal Danish Navy crew (1962-74); post-1976 private owners/crews
- Limitations
- Semi-official private Danish naval-history compilation (Balsved), not a state registry, but the standard public reference for Royal Danish Navy vessels - its stated source is the published Danish fleet list. Laid-down date (11 May 1960) conflicts with NavSource (22 April 1959); the Danish date is carried. Call sign OVEM vs NavSource OVEL - see gaps. Live URL returned HTTP 503 at research time; archived Wayback copy cited. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-02
-
[4]navalhistory.dk (Johnny E. Balsved), SANDVIG (1962-1974) Historie/service data sheet (Danish) - fleet-list and manning timeline, disposal (Wayback capture 2024-07-21; live page returned HTTP 503 - cited as archived) [other_primary]
- Locator
- SANDVIG Historie data sheet, 'Tjeneste' date table (Wayback capture 20240721064420)
- Finding type
- vessel_history
- Finding
- Danish service timeline for this hull: 1 February 1962 'Indgået i flådens tal' (entered the fleet list); 12 February 1962 'Første kommandohejsning' (first command-hoisting); 1962-1963 'Udrustet' (manned/in commission); 1972-1973 'Udrustet'; 12 January 1973 'Sidste kommandostrygning' (last command-lowering); 30 August 1974 'Udgået af flådens tal' (struck from the fleet list); 27 August 1976 'Solgt til det skotske firma Ross & Sons for US$ 33.333' (sold to the Scottish firm Ross & Sons for US$33,333).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1962-1976
- Population
- Royal Danish Navy crews during manning periods (1962-63, 1972-73); caretaker personnel while laid up; 1976 purchaser
- Limitations
- Confirms intermittent manning: the vessel was formally in the fleet 1962-74 but documented as manned only 1962-63 and 1972-73 - consistent with the class's documented early phase-out (ev-05). 'Udrustet' is carried as manned/in-commission per Danish naval usage; exact standing between periods is not detailed. Live URL returned HTTP 503; archived Wayback copy cited. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-03
-
[5]NavSource Motor/Coastal/Inshore Minesweeper Photo Index, MSI section - 'MSI-12 Built in Denmark as Sandvig (M 581)' row; corroborated by the Wikipedia 'List of mine warfare vessels of the United States Navy' inshore-minesweeper section styling 'USS MSI-12' (verified live 2026-10-03) [other_primary]
- Locator
- NavSource archives/11/05idx.htm, Inshore Minesweeper (MSI) index column; en.wikipedia.org List of mine warfare vessels of the United States Navy, 'Inshore minesweepers (MSI)' section
- Finding type
- historical_record
- Finding
- CORRECTION: this record's source-list name 'USS Built in Denmark as (MSI-12)' is a list-parsing artifact. The underlying row is NavSource's index entry 'MSI-12 Built in Denmark as Sandvig (M 581)' - i.e., U.S. bookkeeping hull number MSI-12, laid down under the Mutual Defense Assistance Program at the Naval Dockyard Copenhagen and delivered new to the Royal Danish Navy as Sandvig (M 581). She was never a USS and was never commissioned in the U.S. Navy: MSI numbers were assigned to U.S.-funded inshore minesweepers built in recipient countries for allied navies (sister mapping: MSI-11 = Asvig (M 579)). Of the four Danish VIG-class boats, only Asvig (M 579) and Sandvig (M 581) carried U.S. MSI numbers in the NavSource index - the non-sequential numbering (MSI-12 to M 581, not M 580) is consistent with only two of the four boats being U.S.-funded hulls.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1962 (numbering window)
- Limitations
- Corrects a cataloging artifact, not a material claim. The MDAP funding attribution rests on NavSource's hull-page wording; the exact U.S.-funding status of sisters Mosvig (M 580) and Sælvig (M 582) is not stated by the cited sources - carried in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-04
-
[6]navalhistory.dk (Henning D. Nielsen), 'Minestrygning gennem 60 år' (Minesweeping through 60 years) - VIG-class operational history; corroborated by the VIG Class page, navalhistory.dk/English/TheShips/Classes/Vig_Class(1961).htm (Wayback capture 2024-07-21; live pages returned HTTP 503 - cited as archived) [other_primary]
- Locator
- minestrygning.htm, 'VIG-klassen for dyre i drift' section (Wayback capture 20250118135253); Vig_Class(1961).htm units table (Wayback capture 20240721072200)
- Finding type
- historical_record
- Finding
- Class context for the four-boat VIG class (Asvig M 579, Mosvig M 580, Sandvig M 581, Sælvig M 582): 'Around 1960 the 4 VIG-class vessels arrived. They were somewhat smaller than the SUND class, but fantastically non-magnetic - there was no magnetic material aboard. Even typewriters and galley equipment were specially manufactured. They carried the same sweep-gear system as the SUND class but entirely non-magnetic, cables of type Q1 drawing lower current. They did not get a long life: too expensive to operate, and already by the end of the 1960s they were being phased out per a political decision.' All four class units struck 30 August 1974 (class table, VIG Class page).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1960-1974
- Population
- Royal Danish Navy mine force crews and maintainers, class-wide (1961-74)
- Limitations
- Class-level narrative, not a hull record - documents design intent and the political phase-out decision, not Sandvig-specific work or materials. 'No magnetic material aboard' is the documented phrasing; hull material (presumed wood/composite non-magnetic construction) is not explicitly stated in the cited source - carried in gaps. Live pages returned HTTP 503; archived Wayback copies cited. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-05
-
[7]Fonseca AS et al., 'Historical Asbestos Measurements in Denmark - A National Database,' Int J Environ Res Public Health 2022;19(2):643 (National Research Centre for the Working Environment et al.; PMCID PMC8775413, PMID 35055465; verified live 2026-10-03) [other_primary]
- Locator
- PMC8775413, Introduction paragraphs (peak imports, ban dates, 150,000-worker estimate, pre-1986 vessels sentence)
- Finding type
- gov_survey
- Finding
- Danish national asbestos-era documentation spanning this hull's construction and service: 'In Denmark, the peak consumption of asbestos occurred in the early 1970s, with annual imports of 30,000 tonnes'; first Danish ban on insulation materials in 1972, near-total national ban decided 1986, brake use until 2004; chrysotile the most common type. 'Prior to the bans, approximately 150,000 workers are estimated to have been exposed to asbestos in the Danish construction industry, electricity and heating plants, shipyards, and asbestos cement manufacturing.' 'Asbestos-containing materials can still be found in buildings, vessels and ships constructed before 1986.'
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1971-1997 (measurement span); exposure windows back to pre-1972
- Population
- Danish shipyard workers (national estimate, pre-ban era); Royal Danish Navy crews aboard pre-1986 vessels
- Limitations
- National occupational-health context, not a hull or yard record - documents that Danish shipyards were an asbestos-exposed industry and that Danish vessels built before 1986 may retain ACMs; Orlogsværftet and this hull are not named. The measurement database itself covers 1971-1997, postdating this hull's construction. Does not establish materials aboard this hull, individual exposure, quantity, or present-day presence.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-06
-
[8]Forsvaret (Danish Armed Forces), Marinestaben news item 'Ubekræftede forlydender om asbest i Kongeskibet' (Unconfirmed reports of asbestos aboard the Royal Ship), 20 March 2007 (verified live 2026-10-03) [other_primary]
- Locator
- forsvaret.dk news archive, Marinestaben, 20 March 2007 item (full text of press announcement)
- Finding type
- abatement_record
- Finding
- Official Danish navy documentation of asbestos aboard a fleet vessel of the same navy and era: on 20 March 2007 the Navy temporarily transferred the crew of the royal yacht DANNEBROG to other duties pending an independent check of suspected residual asbestos; the announcement states the ship 'was renovated for asbestos in the early 1990s' (blev renoveret for asbest i starten af 1990'erne) and that the Naval Operational Command and Defence Materiel Service treated the allegation very seriously.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1990-2007
- Population
- Royal Danish Navy crews and refit/abatement workers, fleet-wide (1990s-2007)
- Limitations
- Different hull (royal yacht Dannebrog), not this minesweeper - documents Royal Danish Navy fleet-wide asbestos legacy and early-1990s abatement practice only. Outcome of the 2007 investigation is not stated in this item. Does not establish materials aboard Sandvig or any exposure aboard it.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-07
-
[9]Era inference built on: navalhistory.dk SANDVIG/VIG class specifications (2 x Werkspoor diesels, non-magnetic construction, 193 t); NavSource MSI-12 specifications; NRCWE Danish national asbestos database (ev-06); forsvaret.dk fleet-asbestos item (ev-07) [other_primary]
- Locator
- navalhistory.dk SANDVIG specifications and VIG-class comments; NavSource 11/0512.htm specifications; PMC8775413 introduction
- Finding type
- asbestos_application
- Finding
- A small diesel-powered inshore minesweeper built 1960-62 at the Danish state naval dockyard sits inside Denmark's peak asbestos-use era. Era-consistent applications aboard a vessel of this type and period were engine and exhaust lagging, gaskets, valve packing, electrical insulation, and interior/deck fittings. As a diesel vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply. Her fully non-magnetic construction ('no magnetic material aboard', special-manufacture fittings) suggests but does not prove reduced conventional-material content. The hull plausibly survives - documented as a Spanish cruise vessel in 2006 - so present-day ACM status is an open question rather than a closed one.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1960-present (hull plausibly extant)
- Population
- Orlogsværftet construction trades (1960-61); Royal Danish Navy crews during manning periods; 1976-onward private conversion/yacht crews
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, build specification, or work package located for Sandvig (M 581). Names era-standard applications, not confirmed installed materials. No quantity. Non-magnetic construction may have reduced or substituted for some conventional materials - net asbestos effect is undetermined. Product names are normalized era terms; no manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-08
-
[10]Batch-7583 search ledger (this record): NavSource index + MSI-11/MSI-12 pages; navalhistory.dk SANDVIG data sheet, Historie data sheet, VIG class, and 60-year minesweeping history (via Wayback); Wikipedia mine-warfare list; NHHC/DANFS check; CourtListener (blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-built-in-denmark-as-msi12-01 through -12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming MSI-12 or Sandvig (M 581) was found in the public sources searched (see search_ledger). CAVEAT: CourtListener could not be queried this session - the authenticated helper reported HTTP 429 (fleet daily quota exhausted, ~5.2 h to reset) on the first request; logged as blocked in search_ledger, not as a negative result. A secondary web litigation sweep surfaced no qualifying case - 'Sandvig' hits are surname collisions (e.g., Sandvig v. 3M Company, N.D. Fla.; Judge Melvin D. Sandvig), not this vessel.
- 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 - Danish naval work records are largely undigitized and this hull spent only limited periods manned. The litigation repository search is a genuine open gap (throttled, not run). Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-09
-
[11]Archival leads identified in the cited sources' own credits: Marinens Bibliotek (Danish Naval Library) archive - source of the Sandvig photo in the minesweeping history; archives of Gunnar Olsen - source of the Sandvig data-sheet photo; Olsen & Storgaard, Flådens skibe og fartøjer 1945-1995 (1998, ISBN 87-87720-13-2) - the cited published fleet reference; Orlogsmuseet (Royal Danish Naval Museum) collections [other_primary]
- Locator
- Photo credits and 'Sources' sections on the cited navalhistory.dk pages
- Finding type
- historical_record
- Finding
- Undigitized primary sources for this hull exist in Danish naval repositories: the Marinens Bibliotek archive and the Gunnar Olsen collection (credited for the Sandvig photographs on navalhistory.dk); the published fleet list Olsen & Storgaard, Flådens skibe og fartøjer 1945-1995 underlies the navalhistory.dk data sheets. Orlogsværftet build records, MDAP offshore-procurement files, and any decommissioning/sale documentation for the Ross & Sons transaction would sit in Danish national or naval archives (Rigsarkivet) or U.S. security-assistance records - none were searched this session.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- n/a (research leads)
- Limitations
- Archival leads only - these repositories were identified from source citations, not searched. No asbestos content is asserted for any of them; they are the likeliest remaining leads for hull-specific material or work records.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-denmark-as-msi12-10