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Propulsion in a Seaway

  • ​The ocean environment tends to reduce the speed and increase the propulsion power on a ship.
  • Kongsberg Maritime are researching the effect of added hull resistance and propulsive effects from waves and other environmental forces based on model tests, full scale measurements and computational modelling.
  • Prediction tools are continuously being developed and improved to take the influence of waves on power-speed predictions into account and when estimating the corresponding propulsion related energy consumption.
  • The time histories to the right show a full-scale recorded case study on how the propulsion power and speed changes for a 130 m long ship in wave and wind sheltered seas compared to the open ocean.
  • In the first part, the ship comes from a sheltered fjord at the Norwegian coast (see the map) before entering into the open ocean and thereafter sail into a new sheltered area again
  • Route

  • Speed and Power