There was also no instruction to NOT put in an offset to avoid overflying Erebus. If th volcanco is erupting in front of you, you are not obliged to fly over it, and it might be quite a good idea not to.
You truly are an idiot. How are you going to determine a volcano is erupting if you're in IMC? Mods, this prat has had enough airtime, the discussion is going no where, please do the right thing.