Ketch mizzen sheet. So on a ketch, the dual purpose of the mizzen sail is to both propel and balance the vessel, while on a yawl, the smaller mizzen mainly serves the purpose of trim or balance. Yawls tend to have mainsails almost as large as those of comparable sloops. A ketch may be distinguished from a cutter or a sloop by virtue of having two masts rather than one, though a ketch with two foresails is sometimes called a "cutter-rigged ketch". Both the ketch and the yawl differ from the two-masted schooner, whose aft mainmast is taller than the foremast.
Jack Ketch Jack Ketch John Ketch (died November 1686), generally known as Jack Ketch, was an infamous English executioner employed by King Charles II. He became famous through the way he performed his duties during the tumults of the 1680s, when he was often mentioned in broadsheet accounts that circulated throughout the Kingdom of England. He is thought to have been appointed in 1663. He executed the death sentences against William Russell, Lord Russell, in Lincoln's Inn Fields on 21 July 1683, and James Scott, 1st Duke of Monmouth, on 15 July 1685, after the Monmouth Rebellion. Ketch's notoriety stems from "barbarity