Section 2 in The Port Rules for the Port Of Visakhapatnam
2.
All sea-going vessels on entering or leaving the port between sunrise and sunset shall fly their national flag, and when entering the port, each vessel shall show her number. Vessels anchoring in the roadstead must leave sufficient sea-room for vessels to enter or leave the harbour.Sailing' vessels of 100 tons and upwards shall not enter or leave the harbour unless towed by one or more of the port tugs.
