Turning Circle - Steady-State Radius
Steady-state turning-circle radius estimate using simplified Clarke-style formula - quick operational check for port entry.
Tactical radius
440m
Formula, assumptions, and limits
$$R \approx L \cdot f(\delta_R)$$
Rough estimator; real radius depends on ship type (containerships 2.5–3 L, VLCC 3.5–4 L, fishing vessel 1.5 L). IMO limit tactical diameter ≤ 5 L at 35° rudder.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $L$ | LBP | m | ship particulars |
| $\delta_R$ | Rudder angle | deg | helm order |
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