SM UC-21

1916 Type UC II submarine
Vehicle u_boat Q762819
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SM UC-21

Summary

SM UC-21 is an U-boat[1]. It ranks in the top 6% of u_boat entities by monthly Wikipedia readership (6 views/month).[2]

Key Facts

  • SM UC-21's image is recorded as Simsadus- London; The American navy in Europe (1920) (14580064668 - UC 56).jpg[3].
  • SM UC-21's instance of is recorded as U-boat[4].
  • SM UC-21's operator is recorded as Imperial German Navy[5].
  • SM UC-21's manufacturer is recorded as Blohm+Voss[6].
  • SM UC-21's vessel class is recorded as Type UC II submarine[7].
  • SM UC-21's Commons category is recorded as SM UC-21[8].
  • SM UC-21's participated in conflict is recorded as World War I[9].
  • SM UC-21's yard number is recorded as 271[10].
  • SM UC-21's Freebase ID is recorded as /m/05mtff5[11].
  • SM UC-21's significant event is recorded as ship commissioning[12].
  • SM UC-21's significant event is recorded as ship launching[13].
  • SM UC-21's location of creation is recorded as Hamburg[14].
  • SM UC-21's described by source is recorded as uboat.net[15].
  • SM UC-21's different from is recorded as SM U-21[16].
  • SM UC-21's different from is recorded as SM UB-21[17].
  • SM UC-21's Dreadnought Project page is recorded as S.M.S.UC_21(1916)[18].
  • SM UC-21's country of registry is recorded as Germany[19].

Why It Matters

SM UC-21 ranks in the top 6% of u_boat entities by monthly Wikipedia readership (6 views/month).[2] It has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[20]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [20] . Wikidata sitelinks. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). SM UC-21. Retrieved May 3, 2026, from https://4ort.xyz/entity/sm-uc-21
MLA “SM UC-21.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/sm-uc-21.
BibTeX @misc{4ortxyz_sm-uc-21_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{SM UC-21}}, year = {2026}, url = {https://4ort.xyz/entity/sm-uc-21}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): SM UC-21 — https://4ort.xyz/entity/sm-uc-21 (retrieved 2026-05-03)

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