Andrew Gideon wrote:
On Tue, 17 Jul 2007 10:41:57 -0500, Gig 601XL Builder wrote:

The AIM statement and having the Xponder set to ALT when it is on are not
counter to one another.

Hmm. I've always assumed that older transponders needed a warm up period.
Otherwise, why does STANDBY exist?

They did.

Back in the tube days the transponder took a while to warm up and
most places didn't want everyone on the ground squaking 1200 and
cluttering up their screens.

So you turned it to standby so it would be warm by the time you were
ready to take off.

These days the only tube left is the pencil tube and that's fading
into history as transponders go totally solid state.

Plus nowdays as others have mentioned ground traffic is monitored.

--
Jim Pennino

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