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Crash Stop Distance

Track reach during full-astern crash stop - IMO MSC.137(76) requires ≤ 15 L. Order-of-magnitude estimate using momentum and astern thrust.

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Formula, assumptions, and limits

dstop=12MV02Fasternd_\text{stop} = \frac{\tfrac{1}{2} M V_0^2}{F_\text{astern}}
SymbolMeaningUnit
MMShip mass (× 1.05–1.10 for added mass)kg
V0V_0Initial speedm/s
FasternF_\text{astern}Mean astern thrustkN

Source: IMO Resolution MSC.137(76)

In short

Track reach during full-astern crash stop - IMO MSC.

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