Pivot point location along the ship when making headway / stern way - the instantaneous point of zero transverse velocity that governs tug-handling.
Formula
$$ x_{pivot} \approx 0.25 L_{PP} \ \text{(ahead)}; \ 0.75 L_{PP} \ \text{(astern)} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $L_{PP}$ | Length between perpendiculars | m | ship particulars |
Sources
- Bowditch Vol.1 Ch.32 - Ship Handling.