More info on the vessel can be found here:
https://balticworkboatsus.com/vessel/pilot-1700-wp/
This video is filmed in 2015, edited 2021.
A maritime pilot, marine pilot, harbor pilot, port pilot, ship pilot, or simply pilot, is a mariner who maneuvers ships through dangerous or congested waters, such as harbors or river mouths. They are navigational experts possessing knowledge of the particular waterway such as its depth, currents, and hazards, as well as being experts in handling ships of all types and size. A Maritime pilot is an expert ship handler who is licensed or authorised...
A handy and simple tool to determine in a minimum time what is really needed as tug assistance, is the Bollard Pull Calculator which calculates in an approximate way the total required tug power for ships in various conditions of wind and current. This tool can be loaded as an app on the smart phone.