Plenty of us use flying cameras and advanced drones for aerial photography. These devices can also be used to save lives. Microdrones is using drones equipped with compact flotation devices and cameras to rescue people in trouble in water.
A md4-200 or md4-1000 unmanned aerial vehicle is deployed as soon as the lifeguard detects someone is drowning. The drone flies to the victim, steams live video to the lifeguard, and drops a RESTUBE floating device to buy time. What do you think? Good idea?