A ketch therefore USES three primary sails: the mainsail and headsail, as on a sloop, plus the mizzen sail 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。
2
The halyard typically rises from the head of the sail to a block at the head of the mast and back down to deck level, from where it is pulled up to raise the sail.
升降索通常从帆的前侧延伸到桅杆顶端，然后下降到甲板平面，在甲板上拉起升降索就能升起船帆。
3
The sail in front, called the jib or sometimes the headsail, mounts on the forestay between the bow and the masthead, with its trailing corner controlled by the jibsheet.