More about the sail
editChambers 1908 has more about the nautical sail: "one of the sails bent to a ship's lower yards, as the main-sail, called the main-course, the fore-sail or fore-course, and the cross-jack or mizzen-course". Equinox ◑ 02:33, 14 March 2019 (UTC)
Uncountable
editThe flight was well off course. --Backinstadiums (talk) 15:04, 15 April 2021 (UTC)