The Commissioning Pennant

The commissioning pennant is the distinguishing mark of a commissioned Navy ship. A commissioning pennant is a long streamer in some version of the national colors of the Navy that flies it. The American pennant is blue at the hoist, bearing seven white stars; the rest of the pennant consists of single longitudinal stripes of red and white. The pennant is flown at all times as long as a ship is in commissioned status, except when a flag officer or civilian official is embarked and flies his personal flag in its place.

Narrow pennants of this kind go back several thousand years. They appear in ancient Egyptian art. They can be seen flying from ships' mastheads and yardarms in manuscript illustrations and Renaissance paintings from the Middle Ages. Professional national navies began to take form late in the 17th Century. All ships at that time were sailing ships, and it was often difficult to tell a naval ship from a merchantman at any distance. Navies began to adopt long, narrow pennants, to be flown by their ships at the mainmast head to distinguish themselves from merchant ships. This became standard naval practice.