when does a "remain clear" instruction end?

Howdy!

In article ,
Arden Prinz wrote:
Hi Steven,

You've indicated that a "remain clear" stays in effect until ATC
issues a subsequent communication that permits or requires entry into
the class C airspace. This sounds reasonable. The real question is
knowing what communications permit or require entry into the class C
airspace and which ones do not so that when I'm in the air and hear a
communication I can know whether that communication suffices.

The ATC handbook (7110.65) includes:

7-8-4. ESTABLISHING TWO-WAY COMMUNICATIONS

Class C service requires pilots to establish two-way radio
communications before entering Class C airspace. If the controller
responds to a radio call with, "(a/c call sign) standby," radio
communications have been established and the pilot can enter Class C
airspace. If workload or traffic conditions prevent immediate provision
of Class C services, inform the pilot to remain outside Class C
airspace until conditions permit the services to be provided.

Thus, the sequence:

N1234: Podunk tower, N1234...rest of stuff in initial callup
Podunk: N1234, remain outside Charlie airspace and standby.
N1234: Podunk tower, N1234.
Podunk: N1234, standby.

authorized entry. The second exchange did not instruct the pilot to
remain clear. Steve has insisted the contrary, and even claimed to
be a controller working Class C airspace, and claimed to reference
7110.65. I quote what I found on the FAA website. Steve has declined
to rebut with actual citations. His sudden silence on this matter
would seem to be a concession that perhaps he misspoke.

You wrote:
For the third or fourth time now, the controller would have to issue an
instruction that permitted or required entry into Class C airspace.
Examples are, "proceed on course", "fly heading XXX, vector for sequencing",
enter right base for runway XX", etc.

I'm not sure where you got this list.
Does "proceed on course" always permit entry, or does it depend upon
the relative positions of the airplane, class C airspace, and route of
flight? For example, if I'm headed away from the class C airspace
toward an intermediate waypoint and I hear the "proceed on course",
can I then go through the class C?

7110.65, the order prescribing air traffic control procedures and
phraseology for use by persons providing air traffic control services,
offers no special phraseology for the (hypothetical) instruction Steve
insists must be given.

At least, I can find no such reference in 7110.65P, the version that
took effect February 19, 2004.

yours,
Michael


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