1. Trondheim Tekniske Fagskole The “Design Wave Philosophy’’ Calculation of the design wave Wave forces on semi-submersible platforms Wave forces and bending moments in FPSO-ships Platform movements in large waves Examples of heavy weather damage What is a Rogue Wave ? Why, where and when ? Shall we design against Rogue and Freak Waves ? *****What can a platform master do ? ***** Remote-sensing of sea conditions Search And Rescue and emergency operations Decision making in an emergency What is left to Platform Master ?

2. Trondheim Tekniske Fagskole What is left to Platform Master ?

3. Trondheim Tekniske Fagskole What is left to platform master Standard forecasts Wave models and their limitations Complex sea states From parametric description to extreme waves Met.no human analysis warning services When to expect the unexpected

4. Trondheim Tekniske Fagskole What value in Met’Offices warnings ? Mostly based on Benjamin-Feir instability, and we just saw not conclusive. Difficult to assess how good the chosen omens are. Difficult to find volunteers to go into the worst areas of storms and validate the forecasts...

5. Trondheim Tekniske Fagskole What value in Met’Offices warnings ?