The division of labor between the F-15E’s pilot and weapons systems officer allows both to perform their tasks far better than a single pilot could.

The rescue of a downed F-15E’s WSO (Weapons Systems Officer) from inside Iran has made for one not the most dramatic moments of Operation Epic Fury. After the F-15E became the first manned aircraft shot down behind enemy lines in a generation, the WSO evaded enemy forces for 48 hours before being successfully recovered deep within Iranian territory. 

The WSO serves as the F-15E’s back-seater, with the pilot upfront. While the pilot is typically considered the star of the show, the WSO’s responsibilities are critical to mission success. Responsible for sensors, weapons, navigation, and mission execution, the WSO turns the F-15E from a fast jet into a precision strike system. 

What Does the Weapons Systems Officer Do?

The complex mission profile of the F-15E requires a division of labor. The pilot flies the aircraft. The WSO, meanwhile, fights the aircraft; his or her primary responsibilities include target, weapons employment, sensor management, and navigation and missions planning. Basically, the WSO manages the kill chain, from detection to impact. 

For sensor management, the WSO operates the AN/APG-70/APG-82 AESA advanced sensor suite. Specifically, the WSO controls scan modes and target prioritization, allowing for air-to air tracking and ground mapping (SAR). With the LANTIRN/Sniper XR targeting pod, the WSO identifies targets and laser designates, using infrared and TV imagery. The WSO also interfaces with the RWR (Radar Warning Receiver) and ECM systems, providing an increasingly important electronic warfare function. Essentially, the WSO builds the tactical picture for the pilot in real time. 

The WSO is also who makes the F-15E lethal; he or she controls weapons employment. For air-to-ground, the WSO programs JDAM coordinates and laser-guided bombs, releasing the weapon’s timing and designating targets. During air-to-air combat, the WSO manages the AIM-120 radar targeting and the AIM-9 cueing alongside the pilot. The WSO ensures that the correct weapon is used against the correct target, coordinating multiple simultaneous engagements when necessary.

The WSO Has Non-Combat Tasks, Too

Navigation and mission execution also fall to the WSO. The F-15E Strike Eagle is more than a fighter jet; it was designed to carry out ground attack and long-range strike missions, giving it an incredibly versatile mission set. Accordingly, on any given mission, the F-15E might be carrying out a wide range of tasks, making the WSO vital to mission success.

As a low-level strike platform, the F-15E uses terrain-following radar (TFR), which the WSO supports through monitoring the flight path and threat zones. The WSO also manages waypoints and Time on Target (TOT). And as the battle space changes in real-time, the WSO updates targets mid-flight, adjusting the attack plan in real-time to match evolving circumstances. 

In other words, the WSO is not just a passenger, but a critical component to the F-15E’s function; the pilot and WSO remain in constant communication, continuously cross-checking one another’s work. The pilot doesn’t take the WSO for granted; the WSO offloads cognitive load from the pilot. If the WSO were not present, the F-15’s pilot would need to maneuver under threat and identify threats and cue weapons all by himself. The WSO allows the pilot to simply focus on maneuvering the aircraft. In effect, the two-seat configuration increases combat effectiveness under stress.

The tactical benefits of the two-seat configuration are the enablement of deep strike missions and night/all-weather ops—which is what makes the F-15E so valuable. In sum, the WSO is far more than a mere support player; the role is mission critical, allowing the F-15E to operate as a true multirole platform.

About the Author: Harrison Kass

Harrison Kass is writer and attorney focused on national security, technology, and political culture. His work has appeared in City Journal, The Hill, Quillette, The Spectator, and The Cipher Brief. He holds a JD from the University of Oregon and a master’s in Global & Joint Program Studies from NYU. More at harrisonkass.com.

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