In a previous article, Larry Dighera said:
If one assumes a worst case scenario of 250 knot traffic, six seconds
works out to 4,167'/second, or 25,000' (greater than 4 nautical
miles).

This sounds like orbital speed.

250 knots is 250 (nautical) miles per HOUR, about 250*6000 feet per
hour, or about 250*100 feet per minute. 25000 feet every sixty seconds,
or 2500 feet every six seconds. Half a mile in six seconds. Opposite
direction traffic at the same speed and your relative change is a mile
in six seconds.

Jose

Damn decimal places.... :-)

You non-Unix/non-Mac users don't know what you're missing:

[tomblin@chicago ~]$ units
2084 units, 71 prefixes, 32 nonlinear units

You have: 250 knots
You want: feet per 6 seconds
* 2531.7148
/ 0.0003949892
You have: ^D
[tomblin@chicago ~]$

250 knots is 2531.7 feet in 6 seconds.


--
Paul Tomblin http://xcski.com/blogs/pt/
"You must be smarter than this stick ---- to put a machine on the
Internet."