Garmin 296/396 Terrain Data

On 13 Dec 2005 06:41:03 -0800, "jmk" wrote:


Ted wrote:
And then, they build that nice new 2,000 ft radio tower....

This brings up an interesting idea of putting an electronic beacon on new
structures for the first year or so until all terrain data bases get
updated.

That's basically an idea we submitted to the FAA many years ago, back
before ADS-B was called ADS-B. In addition to the usual
"squirt/listen" in each aircraft, add a simple squirter to each tower
above a certain AGL height (same as the "flashing red light" rules).
Nothing special required to the aircraft installation - the antennas
and other such obstacles simply look like aircraft to avoid.

Total cost (we were talking about low power VHS) of the transmitter in
todays dollars would be around $15 per tower (less any FAA
administration fees and liability insurance). Even that is probably a
high figure - more for the weatherized case than anything else. Since
the obstacles presumably never moves, no GPS required - just a fixed
string msg.

And about $1000 to get someone who is "certified" to take it up there
and install it.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com


[Oh yeah, the then administrator nixed the idea. Said in-cockpit
weather and aircraft imagery was too complicated for pilots to
understand, and that the only thing he would EVER approve was the
uplink of text weather and charts.]

And about $1000 to get someone who is "certified" to take it up there

and install it.

Fortunately, that wasn't part of MY job description! G Although
you will appreciate that one time a "friend" talked me into helping him
take down a couple of hundred feet high ham-band Yagi in a fairly stiff
wind. We were fairly securely attached, and it was *probably* safer
than it felt, but that thing swaying back and forth with us on top,
trying to unbolt the antenna (we were taking the array, not the mast),
was a feeling I will never forget. [And hopefully, never experience
again. G]

jmk