Safe Guard / Lifebuoy launcher

Using the launcher shoot out the pack, while pack close to the sufferer, control the pack expanded and turn into a lifebuoy. It is no need to jump into water, it can rescues the sufferer and also keep us safe.
Pack has two ropes connect with launcher, one of the rope can pull the people back when they grab the lifebuoy, another one can make the pack expanded turn into lifebuoy, this function controlled by the trigger.
Pack can use without launcher, just pull the bolt upon the pack by oneself. And it is more convenient to carry then normal lifebuoy.
Whatever the using way, Safe Guard can always reuse, it won cause damaged to our environment.