The mizzensail functions much like a second mainsail.
航行中后桅帆基本上就像第二面主帆一样工作。
2
A ketch therefore USES three primary sails: the mainsail and head sail, as on a sloop, plus the mizzensail aft.
因此,双桅帆船使用三面主要的帆:与单桅帆船一致的主帆,前帆,以及尾桅帆。
3
For example, with the wind at an intensity that a sloop might have to double-reef the main to reduce sail area, a ketch may sail very well under just jib and mizzen.