Basic 1090
That’s right
Basic mode a/c a mode A/c transponder without ads b out.
Mode S can be selectively interrogated by radar.
Rather than just interrogating everything in sight.
But even mode S doesn’t have ads b out.
Only mode S extended squitter (ES) replaces w ads vector info.
What I’m hearing is once you get away from major metropolitan airspace,
a lot of smaller aircraft not equipping w ads b
If they don’t go into the airspace that requires it,
they don’t have to get it.
It’s a mixed blessing. Great where everyone has it,
but no guarantee one is seeing everyone else.
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David Wartofsky
Potomac Airfield
10300 Glen Way
Fort Washington, MD 20744
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