JD-EE
Hi. I was merely comparing the need for a landslide of data on demand, and the presence of two black boxes that must be retrieved to be of any use. A setting of Mayday on the Tx, or a button push in concert with a distress call could rapidly send all the data needed for forensic reconstruction of flight, (accident). No perpetual transmission is needed, merely the pilot's sending, or the a/c sending a data dump at Law switch. The need for a concentrated "Loop" of pertinent flight data is far, far less expensive than a constant drone of completely unnecessary recordings.
You don't like my idea? Tagged Air Computed Airspeed. TACA. It's proprietary, but it makes pitots completely ballast.
The nano-nano came from a discussion I was having with my brother, the cosmologist. Plus a wager on who would take the time to compute the metrics.
From a land where Light cannot get out of its own way, actually.
Mois Aider = M'Aider, meaning "help (aid, or assist me)" pronounced "May Day".
Apropos the etiology given we discuss a French tragedie.
rgds, bear