Charts show what stands out in the area, near New York or
Los Angeles, major roads stand out, in the desert a dirt
path will be shown. Pipelines will show for years, the
digging and different vegetation, the heat from the pumping,
and the pumping stations are obvious.

Near a terminal, they probably won't show pipelines because
there are too many, but once away from the area, where an
individual line can be seen, they will begin to plot them.
Pipeline patrol pilots use engineering topo maps and look
for leaks [dead vegetation] and construction near the line.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"Roy Smith" wrote in message
...
| In article
et,
| "Steven P. McNicoll"
wrote:
|
| "BTB" wrote in message
| news:smV6g.4324$_c1.3146@fed1read05...
|
| Did my BFR yesterday and while going over the local
sectional, I noticed
| something and asked the instructor about it.
|
| It was a dashed blank line, labelled 'underground
pipeline'.
|
| Now I have to ask - why if it is underground, is it on
the chart ? What
| is the possible value of it being there ?
|
|
| If it goes through a forest it will be cleared of trees.
If it's in snow
| country it will probably be free of snow during the
winter as the product
| being piped is warm. The pipeline is out of sight but
it's presence can be
| quite visible.
|
| It could also be a hint that slow and low aircraft (i.e.
pipeline patrol)
| could be found along that route.