Why about 100 foam plastic balls of orange color with a plastic orange flag and LED light (blinking for 3-4 months after contact with water) cannot be placed inside the fuselage on an aircraft which costs hundreds of millions? The size could be of a tennis ball, an additional weight and cost almost zero.
This is a great thought. If something like this works it would save tens of millions.
Way to go, capt'n. Everybody complains about how beta has lots of empty spaces and you send a link for a page on mobile wikipedia with... you guessed right, lotsa empty spaces when opened on non-mobile computer.
similia similibus curantur