Anyone who actually knows the answer to your question can't tell you, so don't believe any answers you get. Sorry...
Fair enough. It makes sense. But there's still a difference between an Air Marshal and a regular (be it Federal or State level) police officer. The Air Marshall is trained for that environment, a regular cop may not be, and may not be allowed to travel with his firearm, hence my question.
"Air Marshals" as you understand them in the US do not exist here. Instead, we have officers who get the training and qualify for those duties, but do not belong to a separate law enforcement agency, but instead, to any of the two national level police forces we have.