First and second overshoot angles in a 10°/10° zig-zag manoeuvre per IMO MSC.137(76): first overshoot ≤ 10° for L/V < 10 s, ≤ (5 + L/2V)° otherwise; second overshoot ≤ 25°.
Formula
$$ \alpha_1 \leq \begin{cases} 10^\circ & L/V < 10 \ 5 + L/2V & 10 \leq L/V < 30 \end{cases}, \quad \alpha_2 \leq 25^\circ $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $L$ | LBP | m | particulars |
| $V$ | Speed through water | m/s | log at trial |
| $\alpha_1, \alpha_2$ | Observed first / second overshoot | ° | sea trial gyro record |
Sources
- IMO Resolution MSC.137(76).