Typical Values By Vessel Type

---
name: orcawave-damping-sweep-typical-values-by-vessel-type
description: 'Sub-skill of orcawave-damping-sweep: Typical Values by Vessel Type (+1).'
version: 1.0.0
category: engineering
type: reference
scripts_exempt: true
---

# Typical Values by Vessel Type (+1)

## Typical Values by Vessel Type


| Vessel Type | Roll Damping (% critical) | Notes |
|-------------|---------------------------|-------|
| FPSO | 5-10% | With bilge keels |
| Tanker | 3-8% | Varies with loading |
| Semi-submersible | 8-15% | Large radiation damping |
| Spar | 3-6% | Strake-dependent |
| Barge | 2-5% | Low damping |

## By Loading Condition


| Condition | Typical Adjustment |
|-----------|-------------------|
| Full load | Base value |
| Ballast | -20% to -30% |
| Partial load | -10% to -20% |
| Transit | +10% to +20% (hull exposure) |