TSS Terschelling - German Bight The following container vessels are at risk of losing containers and touching the seabed during heavy weather and high waves from a west-northwest to north-easterly direction: - Container vessels of 100-200m in length. With a wave height of more than 3.0m. Masters must take appropriate measures and alter course if necessary to avoid broaching and coming abeam to the waves. - Container vessels of more than 200m in length. With a wave height over 4.0m. Masters must take appropriate measures and alter course if necessary to avoid broaching and coming abeam to the waves. Masters are recommended to follow an alternative route via TSS East Friesland.