I did ask early in this thread, how many North Sea flights are there, daily/ weekly merely asking, you seem like someone in the know?
And since I saw your question I've been trying to find out.
What I've been able to see is that Aberdeen has about 100 helicopter movements per day (some sources say 200), Norwich has 40 departures per day (not sure how many movements that equates to, maybe double if they come back) and I've read there's a similar amount (around 50 movements or more from Holland).
Haven't been able to find Dansish helicopter movements and I think Norwegian movements are at least 150 or 200 per day and I can't find what the movements are for Sumburgh.
But, a
very rough estimate would put it at somewhere between 300 and 500 movements per day throughout the North Sea (I think)?
It would be nice if someone could help please.