You do when you're flying low and you need to escape the munition's effective radius. Retarded bombs are slowed with a variety of mechanisms, from spring-loade

You do when you're flying low and you need to escape the munition's effective radius. Retarded bombs are slowed with a variety of mechanisms, from spring-loaded airbrakes to inflatable ballutes to parachutes. Fuzing can range from superquick for conventional bombs to extended timers for nuclear weapons, all depending upon the application. These parachutes would be great for low flying drone bombers as well as munitions that are highly attitude-sensitive (such as those with improvised fuzes).