Signs and symptoms. Eye floaters are suspended in the vitreous humour, the thick fluid or gel that fills the eye. The vitreous humour, or vitreous body, is a jelly-like, transparent substance that fills a majority of the eye. It lies within the vitreous chamber behind the lens, and is one of the four optical components of the eye.
Wind speed is a measurement of the speed of movement of the air, and is typically reported in miles per hour (mph) or kilometers per hour (kph). Reports for maritime and aeronautical operations may use those or knots (nautical miles per hour).
Feb 17, 2015. Wind speed is measured in knots (nautical miles per hour) by an instrument called an anemometer. It is made up of a series of cups that catch the wind. The mechanism pulls on a spring which is calibrated to record the speed. Direction is simply observed by use of a vane or wind sock which points in the direction from which the wind is coming.