Abstract
Someone says the TUG is the workhorse of the harbor as well as the companion of the pilot.So it is, to be sure. Without her we can not use the crowded wharves and intricate channels of our modern harbor. Present-day Japanese ports, however, are badly in need of powerful modern tugs to match the rapidly growing harbors. Not withstanding the operation of the port must not be jeopardiged in spite of inadequate tugs. In the status quo, pilots have to manage to handle Ships in the harbor safely and efficiently. In this little essay I am trying to explain how they manoeuvre recent super liners and super tankers using the old fashioned local tug.
