A question re black boxes to the well informed which is partly relevant to this incident.
With today's technology (as in all the various recording media), why is it that the length of the recordings are not longer than the time currently recorded. I have seen a number of reports (Qantas) where the start of the incident was recorded over.
Also, why does the signal given out by the black boxes only last a short time and seems to be quite "weak". With battery technology available, I would have thought a signal could be send for quite a very long time - like months, not 30 days as well as being a very strong signal.
Thanks