You miss the point of having PLB completely. Had those 3 divers brought a PLB in this diving accident,
3 divers missing off of Java, the Indonesian SAR (Basarnas) & Marine Corps would have rescued them, instead of searching for 10 days & found a dead one on a beach 200 km away and spending tons of $$$ & time (200 rescuers, including 19 divers, 4 helicopters, 12 vessels, including a navy ship, police patrol boat) covering 27,000 square kilometers in search of them.
If I were lost at sea in Indonesia, I wish they would do the same for me. NOAA would contact my brother in USA (he in turns would contact US Embassy in Jakarta) & Basarnas to start the rescue.