Aircraft carriers were fitted with the SLQ-32(V)4, which consisted of two (V)3 systems (one on each side of the ship), and a common computer and display console. SLQ-32(V)3 was the first variant to add an active radar-jamming capability, and was installed on cruisers, battleships, large amphibious ships, and high-value replenishment vessels. The (V)1 was designed to receive high-band radar signals typically transmitted by aircraft and missiles and was fitted to auxiliary ships and frigates, while the (V)2 installed on some frigates and on destroyers could also detect enemy surveillance and targeting radars. Early versions were passive and had no jamming capability. First fielded in the late 1970s, and probably the most widely-deployed naval EW system, this has seen service in seven basic variants. The primary electronic warfare system on US Navy ships is the Raytheon AN/SLQ-32. Although some modern warships are being fitted with sensors able to detect incoming laser energy, and in some instances with anti-laser countermeasures, the text will focus on Radio-Frequency (RF) hardware. Comprehensive Electronic-Warfare (EW) suites have long been a feature of most surface warships, but the brief survey that follows will focus on the equipment fitted to the latest ships from a selection of the world’s major navies.
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