How is the national ensign flown when the vessel is underway?

The national ensign is flown day and night when a vessel is underway. This practice signifies the vessel's nationality and serves as a symbol of the country it represents, demonstrating respect and acknowledgment of sovereignty. When a boat is at sea, displaying the national ensign continuously is important for identification and for asserting the vessel's allegiance to its nation. Flying the flag both day and night is a demonstration of pride and commitment to maritime traditions, ensuring that all vessels understand the status and identity of the ship on the water. The requirement to display the ensign at all times helps maintain consistency and visibility for identification purposes, especially in international waters, where it aids in clarifying jurisdiction and nationality.