||This article relies largely or entirely upon a single source. (September 2013)
||Look up moonraker in Wiktionary, the free dictionary.
The highest sail is moonsail, below that a skysail and next a royal sail
A moonraker, also known as a moonsail, hope-in-heaven, or hopesail, 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.
The equivalent sail, if triangular, is called a skyscraper.
Moonrakers are relatively unusual sails only used on ships built primarily for speed.
- ^ a b The Sailor's Word-Book, by W.H. Smyth, 1867