Sternpost Rudders
Centerline ship rudders that improved steering control for larger sailing vessels in rivers, coasts, and open water.
Core metadata
- ID: ship_rudders_sternpost
- Era: Medieval
- First known date: 1100 (century)
- Region: China and medieval Europe
- Review status: source_checked
- Maturity: N/A
Prerequisites
- Advanced Shipbuilding (Bireme, Trireme) (advanced_shipbuilding_bireme_trireme)
- Iron Working (iron_working)
Dependents
- None.
Fields
- None.
Node sources
- Sternpost rudder (Encyclopaedia Britannica, 2026, textbook) • Supports: node
Prerequisite edge evidence
Edge/source evidence summary:
- Prerequisite edges: 2
- Average edge confidence: 68%
- Prerequisite sources: 2
- expert_inference: 2
| Prerequisite | Type | Confidence | Evidence level | Note | Sources |
|---|---|---|---|---|---|
| Advanced Shipbuilding (Bireme, Trireme) (advanced_shipbuilding_bireme_trireme) | enabling | 68% | expert_inference | Advanced Shipbuilding (Bireme, Trireme) provides a capability that enables this technology without being the only possible path. |
|
| Iron Working (iron_working) | enabling | 68% | expert_inference | Iron Working provides a capability that enables this technology without being the only possible path. |
|
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