The displacement of a yacht is calculated from the water that the yacht displaces and is therefore the metric weight of the yacht. The heavier the yacht, the deeper the draft and the more comfortable it usually is aboard a yacht. Well designed and built steel hulls with aluminum superstructures have a low center of gravity, which means they have less rapid roll and pitch on board at sea. It is not the up and down or sideways movements on board that make you seasick, but the speed at which these movements occur.

Steel and aluminum yachts generally travel slower than complete aluminum yachts, which are much lighter and therefore used for faster cruising and shorter trips.

GRP yachts are 1.5 to 2 times lighter than their steel counterparts and one can compare the comfort on board of these yachts to that of a steel yacht, like a floating plastic part with a steel element. However, there are of course ways to stabilize the movements on board yachts with stabilizers.

In summary, customers need to assess the importance of displacing a yacht based on their travel plans and habits.