I think it's quite simple.. the CVR records the last 30 mins do you even know the difference between the two??
If it's
so simple why do you get it
so wrong?
Cockpit Voice Recorder
Time recorded 30 min continuous, 2 hours for solid state digital units
Number of channels 4
Impact tolerance 3400Gs / 6.5 ms
Fire resistance 1100 degC / 30 min
Water pressure resistance submerged 20,000 ft
Underwater locator beacon 37.5 KHz; battery has shelf life of 6 years or more, with 30-day operation capability upon activation