Many updates due soon.6 Feb 2020 17:23
There is No Set Interval for updates. They are event driven. To say they occur monthly is ridiculous - just look at the RNS tab.
We had a breakdown and hold up on Ice#1. And we had updates more frequently than once, some weeks. I recall some repair guy got stopped in Canada with no visa (can you believe it, the part arrived, but the "approved mechanic" was late to the party). These out of the blue spanners in the works, will generate RNS's as will poking a hole in every target, although if 2 targets are punctured within hours of each other, we'll probably get a 2-in-1.
As for an Airstrip, that may be a requirement for pads more than X miles from a highway for Medic access. With a 50-feet wide iceroad, I suspect it will double-up as an airstrip, for parts or people emergencies - and Erik can fly home for lunch, when his wife cooks his favourite Elk & kidney pie.
:-)
DYOR, Don't Do Your Own Fiction.