Some of the ECM equipment which initially saw use on the Victor, such as the original chaff dispenser and Orange Putter tail warning radar, had been developed for the earlier English Electric Canberra bomber and were already considered to be near-obsolete by the time the Victor had entered service. Significant improvements and alterations would be made to the avionics and ECM suites, as effective ECMs had been deemed critical to the Victor's role; for example, the introduction of the more capable Red Steer tail warning radar. The introduction of the Victor B.2 was accompanied by several new ECM systems, including a passive radar warning receiver, a metric radar jammer and communications jamming equipment. Streamlined fairings on the trailing edges of the wings that could house large quantities of defensive chaff/flares were also new additions. While trials were conducted with terrain-following radar and a side scan mode for the bombing and navigation radar, neither of these functions were integrated into the operational fleet.