Nope, just, very clearly stated in the ops manual, I can't vouch for other incorrect answers or other companies, 250m two crew offshore for Bristow.
Weather generally automated, although this can sometimes fail of course.
Provided that,
The Commander must establish that the take-off path is free of
obstacles.
Also for onshore that the commander must remain clear of cloud and in sight of the surface until TDP and in sight of the surface until the pilot has reached minimum speed flight for IMC in the particular type.
This will of course be for runway departures, not confined area take offs.
Even though it is contrary to our SOP we also regularly practice inadvertent entry into IMC in the hover in the simulator.
Which if not in the hover appears to be very similar to what happened to the crew in Norfolk.