Wind speed is measured in metres per second (m/s) in the form of head-, tail- and crosswind components. In ski flying there are ten separate wind sectors that are measured along the hill, with five in a staggered arrangement on each side; in ski jumping there are seven or less sectors. A hard limit, or "corridor of tolerance", of 2 m/s (6.5 ft/s) is permitted in any one sector at a time: if the limit is exceeded, all pending jumps are halted until winds settle to an acceptable level. Weather conditions must be optimal in order to jump competitively and safely, therefore they are actively monitored by the jury, who continuously collaborate with the race directors in making decisions on how an event will progress. The resulting delays may last anywhere from under a minute, to many tens of minutes depending on how variable the conditions are.