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.
According to AIS past track data, the vessel was obviously too fast on 9 knots and also going down the wind (4-5 bft., take a look at the exhaust from the stack) when entered the inner harbour considering the size and displacement. That speed was approximate 3 ship lengths to the pier and there was the on pier wind after the turn. Why the ship entered the port so fast will be the subject of the investigations to be awaited. Knowing South Korea procedures there will be no just marine...
