In message <[email protected]>, Rob Seaman writes: >On Dec 11, 2010, at 6:36 PM, Warner Losh wrote: > >> ATC systems being unsynchronized means that planes crash; clearly a >> situation we want to avoid. > >Presumably they do have layers on layers of error handling built >in,
They do. But all of those layers are based on reducing traffic density if need be to VFR/CAT-zero where you can only fly if you can visually see that you do not get in trouble. Most major airports would see their throughput reduced to less than 10%, provided they have parallel runways, if not, it will be less than 5%. > as well as contingent procedures - perhaps even traditional >sextant navigation relying on access to a timescale that approximates >Greenwich Mean Time :-) No, the windows of modern cockpits are not big enough to allow rutine use of a sextant. The windows have minimal upward view these days, to give better radiation protection for the crew. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
