Mystery lines on NY VFR terminal chart

[Ron Garret]

The Coney Island crash got me to dig out my NY VFR terminal chart (not
used much as I live in LA) and there's an odd thing on it that I've not
seen before. There are five darkish blue lines radiating out to the
edge of the chart from the boundary of the class B airspace on the LGA
071 142 231 270 and 328 radials. These lines are otherwise unannotated
and there's no explanation of what they are in the legend. They kind of
look like class B boundary lines, but they are just a shade darker, and
they go out to the edge of the chart, well beyond where the class B end.
What are these?

rg

[Gary Drescher]

"Ron Garret" > wrote in message
...
> The Coney Island crash got me to dig out my NY VFR terminal chart (not
> used much as I live in LA) and there's an odd thing on it that I've not
> seen before. There are five darkish blue lines radiating out to the
> edge of the chart from the boundary of the class B airspace on the LGA
> 071 142 231 270 and 328 radials. These lines are otherwise unannotated
> and there's no explanation of what they are in the legend. They kind of
> look like class B boundary lines, but they are just a shade darker, and
> they go out to the edge of the chart, well beyond where the class B end.
> What are these?

They delineate regions of different NY Approach frequencies (see the
approach-frequencies table on the chart).

--Gary

[Doug Parker]

Look on the information panel just to the left of the TAC map under
the Class B, C ,TRSA & Radar App Ctrl frequency section. Those radial
define areas where Class B radio communications are on different
freqencies.

Doug

On Sat, 21 May 2005 17:38:39 -0700, Ron Garret >
wrote:

>The Coney Island crash got me to dig out my NY VFR terminal chart (not
>used much as I live in LA) and there's an odd thing on it that I've not
>seen before. There are five darkish blue lines radiating out to the
>edge of the chart from the boundary of the class B airspace on the LGA
>071 142 231 270 and 328 radials. These lines are otherwise unannotated
>and there's no explanation of what they are in the legend. They kind of
>look like class B boundary lines, but they are just a shade darker, and
>they go out to the edge of the chart, well beyond where the class B end.
>What are these?
>
>rg

[Ron Garret]

In article >,
Doug Parker <dparker1XXX_at_nyc.rr.com> wrote:

> Look on the information panel just to the left of the TAC map under
> the Class B, C ,TRSA & Radar App Ctrl frequency section. Those radial
> define areas where Class B radio communications are on different
> freqencies.
>
> Doug
>
> On Sat, 21 May 2005 17:38:39 -0700, Ron Garret >
> wrote:
>
> >The Coney Island crash got me to dig out my NY VFR terminal chart (not
> >used much as I live in LA) and there's an odd thing on it that I've not
> >seen before. There are five darkish blue lines radiating out to the
> >edge of the chart from the boundary of the class B airspace on the LGA
> >071 142 231 270 and 328 radials. These lines are otherwise unannotated
> >and there's no explanation of what they are in the legend. They kind of
> >look like class B boundary lines, but they are just a shade darker, and
> >they go out to the edge of the chart, well beyond where the class B end.
> >What are these?
> >
> >rg

Ah! Thanks! (The LA TAC should get some of those :-)

rg