# Hydrodynamic Pipeline Error Propagation Where Things Break

> Sub-skill of hydrodynamic-pipeline: Error Propagation: Where Things Break.

- Skill: `vamseeachanta/hydrodynamic-pipeline-error-propagation-where-things-break` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/hydrodynamic-pipeline-error-propagation-where-things-break`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/hydrodynamic-pipeline-error-propagation-where-things-break/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/hydrodynamic-pipeline-error-propagation-where-things-break

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# Error Propagation: Where Things Break

## Error Propagation: Where Things Break


| Stage | Common Failure | Propagation Effect | Detection |
|-------|---------------|-------------------|-----------|
| **Mesh** | Panel normals reversed | All forces inverted in diffraction | Heave RAO → -1.0 at long period |
| **Mesh** | Panel size too large | Missing high-frequency response | RAOs truncated above mesh cutoff |
| **Mesh** | Waterline not closed | Infinite hydrostatic forces | Diffraction solver diverges |
| **Diffraction** | Wrong heading convention | RAO phases off by 180 deg | Vessel moves opposite to waves |
| **Diffraction** | No viscous damping | Unrealistic resonance peaks | Roll RAO > 50 at natural period |
| **OrcaFlex import** | Coordinate system mismatch | Forces applied at wrong location | Vessel spins or drifts wrong way |
| **OrcaFlex** | Missing QTF data | No slow-drift motion | Mean offset too small |