Dipole Antenna - GWX

I've played GWX extensivly when it first came out and then had to take a longer break. Just a few hours ago I reinstalled the game+patch+ sh3 commander. After starting a new game in the year 1939 with the second flotilla I have noticed an antenna slowly turning on my bridge. It wasn't there before, why is it there now?

I guess it's a feature that was implemented since 1.0?