On April 2, two sleek business jets took off from RAF Mildenhall in Suffolk, England, and turned southeast toward the Middle East. They looked like executive transports — smooth fuselages, swept wings, the unmistakable silhouette of a Gulfstream G550. But serial numbers 17-5579 and 19-1587 are not carrying executives. They are EA-37B Compass Calls, the U.S. Air Force’s newest and most capable electronic warfare aircraft, and they were heading into their first combat deployment. CENTCOM confirmed the deployment as part of Operation Epic Fury. After decades of planning, procurement delays, and technical challenges, the EA-37B has finally gone to war. The aircraft it replaces — the EC-130H, a modified Hercules transport that has been jamming enemy communications since the 1980s — is nearing retirement. The Compass Call mission, however, is more relevant than ever.

From Hercules to Gulfstream

The original Compass Call was born in the Cold War. The Air Force took the C-130 Hercules — a rugged, propeller-driven transport built for hauling cargo and troops — and packed it with electronic warfare equipment. The result was the EC-130H: slow, loud, ungainly, but devastatingly effective at its job. For over forty years, it has been the aircraft that makes enemy radios go silent, enemy radars go blind, and enemy commanders lose contact with their forces.

But the EC-130H was always a compromise. The Hercules airframe is slow — cruise speed around 290 knots — and its turboprop engines limit its altitude ceiling. In a modern threat environment filled with advanced surface-to-air missiles, flying a lumbering prop plane near hostile airspace is increasingly dangerous. The EA-37B solves both problems. The Gulfstream G550 cruises at over 500 knots and can operate at altitudes above 45,000 feet — well above the engagement envelope of many short-range air defence systems. It is faster, higher-flying, and far more survivable than the aircraft it replaces. And it carries a completely new electronic warfare suite designed for the threats of the 2020s and beyond.

What Compass Call Actually Does

Electronic warfare is the invisible dimension of air combat. While fighters drop bombs and tankers keep them fuelled, Compass Call operates in the electromagnetic spectrum — the domain of radio waves, radar beams, and data links that modern military forces depend on to function. The EA-37B’s mission falls into three broad categories. First, communications jamming: drowning out enemy radio and data networks so that commanders cannot talk to their troops, artillery cannot receive targeting data, and air defence operators cannot coordinate their fire. Second, radar suppression: degrading or deceiving enemy radar systems to create windows of vulnerability for strike aircraft. Third, and increasingly important: drone command-link disruption.

In the Iran conflict, all three missions are critical. Iran’s air defence network — a layered system of Russian-supplied S-300s, domestic Bavar-373s, and hundreds of shorter-range systems — relies on radar and communications links that Compass Call is specifically designed to disrupt. And Iran’s extensive use of drones, both for surveillance and attack, depends on command-and-control links that are vulnerable to electronic attack.

The Drone War Connection

The timing of the EA-37B’s combat debut is not coincidental. The Middle East conflict has become, in many ways, a drone war. Iran and its proxies have deployed thousands of one-way attack drones, surveillance UAVs, and loitering munitions. Many of these systems rely on GPS navigation and radio command links — precisely the kind of signals that Compass Call is built to jam. A single EA-37B orbiting at high altitude can potentially disrupt drone operations across a wide area, forcing enemy UAVs to lose navigation, lose contact with their operators, or simply crash. This capability — which barely existed when the EC-130H was designed — may prove to be the most consequential aspect of the new aircraft’s deployment.

A Quiet Revolution

The EA-37B will never be as famous as the F-35 or as photogenic as the B-2. Electronic warfare aircraft do not drop visible ordnance or produce dramatic cockpit footage. Their victories are measured in communications that never got through, radar tracks that never appeared, and drone strikes that never arrived. But ask any pilot who has flown into contested airspace with a Compass Call overhead, and they will tell you: it is the aircraft that makes everything else possible. The EA-37B’s combat debut over the Middle East is not just a new chapter for the Compass Call mission. It is the arrival of a capability that will define how electronic warfare is fought for the next thirty years. Sources: The Aviationist, Air & Space Forces Magazine, Scramble, Aviation Week, CENTCOM