The iconic "Flagship" is a recurring enemy in the TRS-80 arcade games created by Big Five Software.
The Flagship is usually the most deadly foe in the game. It features an evil, robotic rotating "eye" and is feared for its deadly (although sometimes inaccurate) laser bolt attack.
The Flagship made its first appearance in Big Five's Asteroids-clone, Super Nova, and went on to appear in most of their other TRS-80 games. The iconic Flagship image would later show up in TRS-80 games created by other companies and individuals, usually with various modifications.
Some details from: The Publisher Website.