The steel antennas take the shape of what I think are called Antelope (I could be very wrong about the name!)
If this is correct it is a form of very long distance communications antenna which co-incides with the sincgar system, it's a satelite sender/receiver antenna.
It would be White at the bottom section (fat section) & black on the upper thinner section.
..of course I could be wrong but its just my two cents!