VK-73, callsign Prowler, is Tau-4's electronic support and countermeasures aircraft. VK-73 orbits the area if operations to offer the unit ECM cover. Prowler is usually assisted by VK-75, callsign Spider, to provide accurate air and ground surveillance. Although a support aircraft, VK-73 is a fierce opponent in the air, currently with 24 gun kills on various aircraft of different specifications. Prowler's airframe has the variable geometry wing function removed to support the large ECM/Radar unit.

VK-73 was named after the lead aircraft of the 12th Night Fighter Wing who was killed in action on February, 18, 2021 over Marseille, France.

Controls:

Standard aircraft controls

Trim for trim

Ag-1 for arresting hook

Ag-2 to close weapon bays

Select weapons to open bays

The AVQ-14E ESM unit can be used to enhanced the ACV-9F's homing capabilities.

NOTE: Due to the installation of the ECM/radar unit, variable geometry wings have been disabled to improve flight characteristics.