The AS-177B/UPX is a rugged sea/land based IFF/SIF Omnidirectional Antenna. This unit is utilized either as a stand alone antenna or in conjunction with a directional IFF antenna.

In the stand alone scenario the AS-177B/UPX antenna is used as a transponder/IFF antenna.

When used in conjunction with a directional IFF antenna, the AS-177B/UPX provides the directional antenna with side lobe suppression minimizing false targets.

The AS-177B/UPX antenna is a simple, rugged. low cost antenna used extensively around the world.