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'''Dynamic Amplification Factor (DAF)''' or Dynamic Increase Factor (DIF), is a [[dimensionless number]] which describes how many times the [[deflection (engineering)|deflections]] or stresses should be multiplied to the deflections or stresses caused by the [[static load]]s when a [[dynamic load]] is applied on to a structure.<ref>Dynamics of structures by Anil K Chopra</ref>
When lifting an object during a sub-sea operation, the DAF is calculated based on dynamic hydraulic forces or on snap-forces. <ref>[https://rules.dnvgl.com/docs/pdf/DNV/codes/docs/2011-04/RP-H103.pdf Modelling and analysis of marine operation], DNV-RP-H103, April 2011</ref>
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