About the presentation

Safe and efficient ship operations in a seaway – Response‐based sea state estimation used in onboard DSS

by Assoc. prof. Ulrik Dam Nielsen

The presentation focuses mainly on work made in relation to the wave buoy analogy, where the central point is to use available wave‐induced global vessel responses (motion components, accelerations, hull girder strains, etc.) to make on‐site sea state estimation from an advancing ship in a seaway. Thus, within technical ship operations at sea – and more generally for all maritime operations – knowledge of the onsite sea state can be used to improve both safety and efficiency. In particular, this type of sea state estimation can provide fundamental information to control‐ and decision support systems (DSS), which also include the area of dynamic positioning, where the sea state estimate can be used for feed‐forward control, improving both station‐keeping behaviour and fuel consumption. Moreover, vessel performance systems for onboard as well onshore (‘in‐house office') fleet analyses gain advantage by having available continuous estimates of the sea state at the particular position.