Nomoto first-order K index from turning-circle steady-state rate of turn - a compact ship-handling metric used in IMO zig-zag and turning tests.
Formula
$$ K = \dot\psi_{ss} / \delta_R $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $\dot\psi_{ss}$ | Steady yaw rate | rad/s | zig-zag / turning |
| $\delta_R$ | Applied rudder angle | rad | helm order |
Sources
- Nomoto K. - JZS 1957.