Tacking - This basic sailing maneuver refers to turning the bow of the trimaran through the wind so that the wind changes from one side to the other side. The boom will always shift from one side to the other when performing a tack or a jibe.
Jibing - The opposite of tacking, refers to turning the stern through the wind. Jibing is a less common technique than tacking, since it involves turning a boat directly into the wind.
Sailing ships cannot proceed directly into the wind, but often need to go in that direction. Movement is achieved by tacking. If a vessel is sailing on a starboard tack with the wind blowing from the right side and tacks, it will end up on a port tack with the wind blowing from the left side. In practice, the sails are set at an angle of 45° to the wind and the tacking course is kept as short as possible before a new tack is set in.