When a boat stops head to wind, which can happen during a tack, it is called ‘being in irons’. The rudder has no effect because the boat is not moving through the water. To get ‘out of irons’, push the tiller away from you and push the boom away to back the mainsail. The boat will move backwards and turn away from the wind. Now pull on the tiller and pull on the mainsheet to get the boat sailing again – ‘push push, pull pull’.