Mobile or any other tower where still human is required to fix defects and upgrade.
Question is - How will you rescue such a man?
Watch Video on YouTube: 
https://www.youtube.com/watch?v=dnv1Fv2PZk8
Why every six months?
Better use high quality Bulb which last for 5 years… 
I worked somewhere in Russia like 20 years ago and had to climb a tower of 300m.
Up there, at 300m, the tower had a balance of about 1m left / right, front / back.
Russian towers don’t have the standard of European standards.
It was a very unpleasant experience and I was looking forward to go down ASAP.
What is the height here?
Do you have any picture for this?
So I can share it with my local group and subcon when they start complaining about 30m tower heights…
No, I don’t… 
Looking at the picture / video I would say is at least 300 meters.
20 years ago, russian towers were probably built in Soviet Union and had USSR standard which usually supposed to withstand a wave from nuclear weapons 
Modern russian towers I think don’t have enough strength 
I’m pretty sure you’ll remember that experience for the rest of your life.
The kind of story that you can share for generations
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