What are the different flag on a ship?

Flags on a ship serve various purposes, including identification, communication, and signaling. The most common types include the national flag, which represents the ship's country of registration; the signal flags, used for maritime communication; and the courtesy flag, flown when a ship is in the waters of Another Country. Additionally, specific flags indicate various statuses, such as a ship being in distress or requesting pilot assistance. These flags are essential for safety and adherence to international maritime regulations.