Our NAS was introduced in 2003 and lasted for one
year before being replaced by our current hybrid
abortion. I'm still not sure who got paid and
who got and gave the bribes, political favours etc. It was disgraceful.
Some people couldn't get their minds around the
being NO AREA FREQUENCY for VFR in G.
The US may have extensive radar coverage but most
of it is SSR which requires transponders but
below 10,000 feet in E you don't need a
transponder unless within 30nm of major airports
so you are invisible to most radar and also airliner TCAS.
In Australia you need a transponder in E with
some exceptions so in both G (with transponder)
and E airliner TCAS can see you.
If you want lots of E under current rules in Oz
with ADSB you'll need ADSB out fitted (still
expensive). A solution searching for a problem.
Dick Smith was of the opinion that traffic
densities in Australia were mostly so low that
SSR, Mode C and TCAS were perfectly adequate.
Unfortunately aviation authorities in Australia
(including GFA and RAAus) never saw a way of
making aviation more expensive and difficult, that they didn't like.
Mike
At 09:34 AM 3/04/2017, Mark Newton wrote:
Itâs not quite the same, though.
Over almost all of the United States, class G
airspace has a 1200' AGL ceiling (700â AGL
near some untowered airports). The bit between
1200â AGL and 18,000â AMSL is class E.
When the new NAS was introduced in 2005-2007,
the regional airlines cohort fought against that
outcome in Australia, on the grounds that they
didnât want their IFR Saab turboprops mixing
it up with VFR in places where radar coverage was low-to-nonexistent.
In my observation, most VFR pilots treat class E
as equivalent to class G anyway, so I think it
was a bit of a pyrrhic victory by the airlines:
They still have VFR traffic in their class-E
approach lanes to major regional airports. Hooray for victory.
In the USA, itâs completely mundane for
transponder-equipped aircraft to call up center
and get a squawk code and flight following after
takeoff, which gets them identified and enables
ATC to deconflict them from IFR traffic in class
E. Thatâs never worked properly in Australia
because our ATC surveillance radar coverage has
been awful, almost entirely focussed on capital cities.
Now that virtually all of Australia has ADS-B
coverage (literally all of it, once the
satellites are airborne), maybe itâs time to
start revisiting that, and replacing large
chunks of class G with class E, and more
strongly encouraging the use of flight following
services. Seems to work okay in North America, yes?
- mark
On 3 Apr 2017, at 3:17 AM, Jim Staniforth
<<mailto:[email protected]>[email protected]> wrote:
CASA claimed they would copy the FAA airspace system.
Below is the text from the only page in the FAA
Aeronautical Information Manual on Class G Airspace.
The key words are "see and avoid".
The link is to the current FAA AIM, a good
reference. My copy/paste is page 159 of the pdf.
Jim
<https://www.faa.gov/air_traffic/publications/media/aim.pdf>https://www.faa.gov/air_traffic/publications/media/aim.pdf
AIM
12/10/15
Class G Airspace
Section 3. Class G Airspace
1. General
Class G airspace (uncontrolled) is that portion of
airspace that has not been designated as Class A,
Class B, Class C, Class D, or Class E airspace.
2. VFR Requirements
Rules governing VFR flight have been adopted to
assist the pilot in meeting the responsibility to see and
avoid other aircraft. Minimum flight visibility and
distance from clouds required for VFR flight are
contained in 14 CFR Section 91.155.
(See TBL 3-3-1)
3. IFR Requirements
a. Title 14 CFR specifies the pilot and aircraft
equipment requirements for IFR flight. Pilots are
reminded that in addition to altitude or flight level
requirements, 14 CFR Section 91.177 includes a
requirement to remain at least 1,000 feet (2,000 feet
in designated mountainous terrain) above the highest
obstacle within a horizontal distance of 4 nautical
miles from the course to be flown.
b. IFR Altitudes.
(See TBL 3-3-1)
TBL 3-3-1
IFR Altitudes
Class G Airspace
If your magnetic course
(ground track) is: And you are below 18,000 feet MSL, fly:
0 to 179 Odd
thousands MSL, (3,000; 5,000; 7,000, etc.)
180 to 359 Even thousands
MSL, (2,000; 4,000; 6,000, etc.)
Class G Airspace 3-3-1
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