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.
Location: England Various shots following a river pilot. He is seen disembarking from one boat and climbing up a rope ladder onto a large ship. Various shots of another river pilot, dressed in a cap, woollen jumper and sea faring jacket. He is seen at the wheel of his boat. Various shots of two river police pilots on the River Thames in London. They are filmed in the cab and on the deck of their boat. They pull up alongside some riverboat houses and talk to a woman who owns one of the them....
