A static line is a device used in parachuting that automatically deploys a parachute when a skydiver exits an aircraft. The line is attached to the aircraft and the parachute, ensuring that the parachute opens at a predetermined altitude. This method is commonly used in military operations and training jumps, as it allows for a reliable and consistent deployment of the parachute. When a skydiver jumps, the static line pulls the parachute from its pack, allowing it to inflate as the jumper falls. This system reduces the need for the skydiver to manually deploy the parachute, making it safer for beginners and in situations where quick deployment is essential.