Initial Turning - IMO MSC.137(76)
Initial-turning ability compliance: ship must achieve 10° heading change within 2.5 ship-lengths from rudder application.
Ship lengths
2.50 -
Pass (≤ 2.5 L)
Yes
Formula, assumptions, and limits
$$d_{10°} \leq 2.5 L$$
Measured from rudder deflection to the instant heading has changed 10°. Critical for large ships manoeuvring in confined waters. Track radius of curvature on the 10° change should be published in the manoeuvring booklet.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $d_{10°}$ | Distance to 10° heading change | m | sea trial |
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