Blue Ensign

A blue ensign is a special type of flag that is used by certain people or groups. It is often blue in color, hence the name "blue ensign."

When a ship is registered with a specific country, it is given a flag to tell others where it comes from. If the ship is registered with a country that has a blue ensign, it may fly that flag in addition to the regular flag of the country.

For example, the United Kingdom has a blue ensign that is used by its naval ships and other vessels that are owned by the government. The blue ensign has a Union Jack in the top left corner, which is the flag of the United Kingdom.

Other countries may also have blue ensigns, but they may look different and have different symbols or colors on them. The blue ensign is sometimes considered a symbol of the authority or power of the group that uses it.