Engineering Services
Seakeeping analysis
How the vessel behaves when the sea is not calm.
A vessel is judged at sea, not in the drawings. We predict motions and accelerations in waves for the sea states your vessel will meet, at the locations that matter — wheelhouse, guest areas, crew quarters, work decks.
Results are measured against recognised comfort and operability criteria, including motion sickness incidence. Where a design falls short, we show which changes help: hull form, weight distribution, speed and heading, or motion control. Slamming risk is assessed for fast craft and exposed bow sections.
What we deliver
- Motion responses (RAOs) in heave, pitch and roll
- Accelerations at defined points across the vessel
- Comfort assessment against motion sickness (MSI) criteria
- Operability analysis for the target area, speeds and headings
- Slamming assessment and report with design recommendations
Typical inputs we need
- Hull lines or 3D surface
- Loading conditions with weights, CoG and radii of gyration
- Operating area or wave data, speeds and headings
- Locations of interest and the criteria to apply
Questions
When should seakeeping be analysed?
As early as the hull form is defined. Changes to form and weight distribution are cheap at concept stage and costly after construction starts.
Can you compare stabilisation options?
Yes. We can show the effect of motion control on roll and comfort, giving input to the choice and sizing of a stabilisation system.