What does Moonraker mean?

Moonraker is actually a nautical term. It refers to a rare sail used on clipper sailing ships. The moonraker would be at the top of the mast, and it was also called a moonsail, hope-in-heaven, or hopesail. (see more here)

Moonraker sail

In Rockaway Beach, there’s a sculpture of a Moonraker facing the Pacific Ocean.