Required tug power and number of tugs needed in variable conditions of wind, current and waves isin most cases an assessment made by pilots based on their professional experience. However, assessments will raise questions by lawyers if something goes wrong. They will use tools to calculate what really is needed with respect to tug power and number of tugs. They have furthermore the advantage of time.
Shortly after 5 a.m. local time the vessel “Else” had a collision in the Kiel-Holtenau lock to the Kiel Canal.
The "Else" subject to pilotage passed the pilot's boarding position without taking a sea pilot on board and collided from the outside into the closed gate of the new north lock. The bow bored into the metal construction and the ship was stuck for about six hours.
For more information about this accident see related content below (articles).