UD-4

Summary

UD-4 is an U-boat^[1]. UD-4 ranks in the top 6% of u_boat entities by monthly Wikipedia readership (9 views/month).^[2]

Key Facts

• UD-4's instance of is recorded as U-boat^[3].
• UD-4's operator is recorded as Kriegsmarine^[4].
• UD-4's manufacturer is recorded as Rotterdamsche Droogdok Maatschappij^[5].
• UD-4's vessel class is recorded as O 21-class submarine^[6].
• UD-4's country of origin is recorded as Netherlands^[7].
• UD-4's participated in conflict is recorded as World War II^[8].
• UD-4's Freebase ID is recorded as /m/0wf_9qv^[9].
• UD-4's significant event is recorded as ship commissioning^[10].
• UD-4's significant event is recorded as ship decommissioning^[11].
• UD-4's significant event is recorded as keel laying^[12].
• UD-4's length is recorded as {'unit': 'Q11573', 'amount': '+77.7'}^[13].
• UD-4's beam is recorded as {'unit': 'Q11573', 'amount': '+6.8'}^[14].
• UD-4's draft is recorded as {'unit': 'Q11573', 'amount': '+3.95'}^[15].
• UD-4's country of registry is recorded as Nazi Germany^[16].

Why It Matters

UD-4 ranks in the top 6% of u_boat entities by monthly Wikipedia readership (9 views/month).^[2] UD-4 has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.^[17] UD-4 is known by 7 alternative names across languages and contexts.^[18]