DP-operated vessel’s station-keeping circle radius under environmental load, per IMCA M103 footprint test.
Formula
$$ R = g \cdot \max(0, F_\text{demand} - F_\text{thrust}) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $F_\text{demand}$ | Total environmental force | kN | CFD / OCIMF tables |
| $F_\text{thrust}$ | Available side thrust | kN | thruster sum × efficiency |
| $g$ | Empirical footprint gain | m/kN | vessel-specific |
Sources
- IMCA M103 - DP footprint tests.
- IMCA M140 - DP capability.