CNN Wolf March 10, 2014 17:36:00
Just recently, it took divers and submersibles to find those. the battery will lost 30 days. but in many cases, in a couple crashes, it was divers who literally felt them and stumbled upon them. but remember, in a terrorism situation, there are hijack codes. and unless the pilots were prevented from entering those codes, and you can send acars messages, there is many ways. so if it was terrorism, it had to happen very, very suddenly, because of whats available on modern aircraft or there had to ...
Acars Messages National Transportation Safety Board Back Seat United States Federal Bureau Of Investigation
Source: archive.org