On Mon, 11 Mar 2019 15:28:57 -0000, Andy Burns wrote:

Commander Kinsey wrote:

hat are those things you see in the middle of nowhere (in the UK at
least), a 10 foot high white pole with an orange roof-shaped lid on top?

Hi-viz poles to allow the chopper to follow the pipeline route easily.

They're not just markers, I'm sure they can actually let off gas.