1.Vessels entering Traffic Separation Scheme No.1 from the north of the virtual safe water mark in precautionary Zone No.1 and those leaving Traffic Separation Scheme No.1,and then going to the south of the virtual safe water mark in Precautionary Zone No.1,must keep the virtual safe water mark at their W side,and should navigate with particular caution. 2.Vessels navigate in Traffic Separation Scheme No.1 with the speed not exceeding 12kn.