Safe navigation in this sea area is to operate at S/B speed, while keeping the engine on standby all of the time becausethe traffic in the sea area is congested. Many large ocean-going vessels have no choice but to make plans to slowdown towards the pilot’s embarkation point, or to start accelerating (R/Up Eng.) immediately after having let the pilotdisembark. However, in congested sea areas like these, avoidance action should be taken by reducing speed withouthesitation, just the same as with cars, and not only through taking avoidance action by changing to a wide headingcourse by force. When the Author was a new Master himself, such unreasonable operations to attempt (S/B Eng.) (enter the bay) around the point of embarkation or disembarkation for pilots and to accelerate (R/UP Eng.,) immediatelyafter the pilot disembarked were enforced. However, as a Master and having gained experience of such an operation,the author became more cautious and exercised safe navigation (S/B or R/UP Eng.) off Su-no-Saki.It is necessary to fully understand these traffic systems in the Kii Suido (Strait) and Tokyo Bay, which were discussedabove. It is also necessary for managers on shore to explain sufficiently to the Masters of ocean-going vessels, who donot have enough navigation experience in these sea areas.