"David Cartwright" wrote in message
...

No offence, but wasn't this a VFR flight? If so, the primary way to find
out about traffic is to look out of the window. I agree that the
circumstances were such that the task of spotting the other guy was made
harder (your low wings and his high wings, for example) but there are ways
(e.g. weaving descents) to improve your chances.

While I agree that electronic assistance can be a very useful secondary
device for picking up the odd bit of traffic you've not eyeballed, it's
essential to remember that looking out of the window is rule number one,
and if you'd descended onto the top of this other aircraft, it'd have been
your fault. The other thing to remember, of course, is that TIS relies on
the other aircraft giving a correct altitude - which in the aircraft I fly
relies on the the pilot having the correct altimiter setting.


Isn't the altitude encoder the source of altitude used by TIS?