Moonraker (sail)

A moonraker, also known as a moonsail,[1] hope-in-heaven, or hopesail,[citation needed] is a square sail flown immediately above a skysail (see sail-plan) on the royal masts of a square-rigged sailing ship.

None of the four- and five-masted square-rigged ships carried a moonsail.

[citation needed] The equivalent sail, if triangular, is called a skyscraper.

[1] Moonrakers are relatively unusual sails only used on ships built primarily for speed.

[citation needed]