On Mon, 19 Jan 2004 07:33:55 -0500, "Robert Henry"
wrote:

This may very well be
the reason for the "any traffic advise please" line, because someone thinks
they are all alone.

So if the pilot uttering that request (despite it not being
recommended by the Advisory Circular) receives no reply, is he to
erroneously believe that he is alone in the pattern? What of the
NORDO aircraft that is incapable of radio communication, or the pilot
who chooses not to respond to such a nonstandard radio broadcast?

Just make the self announced position report broadcasts as the AC
suggests:

The FAA Advisory Circular web site
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/CurACFARFrame?OpenFrameSet
provides AC 90-42, here
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/ACNumber/C54E50252A7FA56D862569D8007804BA?OpenDocument

AC 90-42 defines CTAF "Self-announce" usage as limited to:

"Self-announce" is a procedure whereby pilots broadcast
their position, intended flight activity or ground operation on
the designated CTAF.


Back in February 2002 Roger Long started a message thread on this
topic that accreted 235 articles:
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=b19q7u4dae0hon8cgmgqk7gp9jb10cob1a%40new s-server.socal.rr.com&rnum=4&prev=/groups%3Fas_q%3DAdvisory%2520Circular%26safe%3Dima ges%26ie%3DUTF-8%26oe%3DUTF-8%26as_ugroup%3Drec.aviation.piloting%26as_uauthor s%3Dlarry%2520Dighera%26lr%3D%26hl%3Den