Originally Posted by
SteppenHerring
Apologies for possibly a stupid SLF question: whose call is it on whether to apply anti-ice fluid and what particular type? I know that ultimately the captain is responsible for everything, but if the ground crew declare it "fine", then what?
Always the Captains call, though personally more often than not through experience I've seen the Captain ask the ground crews opinion and took their word for it rather than their own (generally, what else has been deiced, when, who, what aircraft, etc).
I'd be surprised if anything departed in -12c without deicing.