'Triggered Lightning' strands 300 Oil-Platform Workers in the North Sea

[SNOW_JOKE]

I would hazard a guess that the safety measures in-place is due to static current around Helicopter rotorblades, as colder-polar air tends to lack moisture which would otherwise carry the static along with the helicopter - as opposed to being dispersed naturally when the moisture content is higher. Any surface contact the Helicopter has in these 'drier' environments either directly or indirectly (say via sea-spray) would carry the static current down to the ground and pose the obvious risks to Oil Platforms & Workers on the deck.

Weather leaves 300 oil workers stuck in North Sea

WWW.BBC.CO.UK

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"Triggered lightning" has left staff unable to leave platforms near Denmark since November.