Marine Aviators Transitioning to F-35 Face Challenge of Unlearning Harrier Habits

For veteran U.S. Marine Corps aviators making the leap from the classic AV-8B Harrier jump jet to the advanced F-35 Lightning II, the most formidable obstacle in the cockpit is often not the complexity of the new stealth fighter, but the deeply ingrained muscle memory developed over hundreds of flight hours in its predecessor.

The transition comes as the Marine Corps closes an era of military aviation, having officially retired its final operational Harrier squadron this year. Following the drawdown of the long-serving vertical-flight aircraft, many experienced Harrier pilots have been reassigned to fly the fifth-generation F-35, requiring them to systematically discard physical reflexes that previously kept them safe during demanding carrier-based missions.

At the heart of the challenge is the stark difference in how both aircraft achieve short takeoffs and vertical landings. The legacy Harrier was a famously unforgiving machine that required continuous, manual manipulation of three separate flight controls: a conventional stick to govern flight direction, an engine throttle to regulate airspeed and power, and a specialized nozzle lever used to vector the engine’s thrust downwards for hovering.

Mastering the AV-8B required pilots to maintain a relentless cycle of micro-adjustments to remain stable over a moving warship. When executing a shipboard recovery, aviators had to guide the jet through a rigid, step-by-step box pattern—nudging the aircraft left, backward, right, and forward, halting completely after each movement before setting down on the deck pad.

In contrast, the fifth-generation F-35B relies heavily on sophisticated flight-control software and integrated computers to execute vertical maneuvers. Because the new jet responds differently to control inputs, the automatic instincts that once served Harrier pilots well can suddenly produce unexpected and counterproductive results during landing approaches.

When approaching the flight deck in the F-35, former jump-jet aviators frequently perceive that they are closing in too fast. In the Harrier, standard procedure called for pulling back on the controls and increasing engine power to arrest forward momentum. However, inputting those identical commands into the F-35 produces the opposite effect, causing the stealth fighter to speed up and climb away from the designated landing zone.

This counterintuitive dynamic was highlighted by Maj. Travis Theimer, the executive officer of Marine Fighter Attack Squadron 211. Theimer, who accumulated nearly 700 flight hours piloting the Harrier before converting to the F-35 platform, noted that the instinctual reflex is exceptionally difficult to suppress during initial conversion flights.

According to Theimer, almost every aviator transitioning from the Harrier has inadvertently accelerated and climbed over the landing area during their first attempt to decelerate onto the flight deck pad. The recurring error underscores how deeply ingrained the mechanical habits of legacy vertical flight become over years of operational flying.

These training realities were shared during recent deployment preparations aboard the USS Makin Island, an amphibious assault ship hosting units from the 13th Marine Expeditionary Unit. Aviators aboard the vessel have been working through the rigorous training syllabus required to fully certify former Harrier crews in the multirole stealth fighter.

The technological leap between the two generations of combat aircraft highlights decades of aerospace evolution. While the AV-8B featured an altitude-hold capability, it lacked an auto-throttle system, forcing aviators to dedicate a vast portion of their concentration simply to managing engine output and airspeed while remaining airborne.

During its extensive service life, the Harrier served as a dedicated ground-attack workhorse. The aircraft was heavily utilized across post-9/11 operations in Iraq and Afghanistan, where Marine squadrons provided close air support to ground units, carried out offensive strikes, and performed armed reconnaissance across contested terrain.

While the F-35B retains all of those air-to-ground strike capabilities, its tactical scope extends much further into modern warfare domains. The stealth jet is engineered to perform high-end air-to-air combat, locate and destroy sophisticated enemy air defense systems, and operate as an airborne information node by networking battle data directly to allied aircraft and infantry units on the ground.

The mechanics of vertical recovery aboard amphibious assault ships are also substantially streamlined in the F-35B. Its automated systems can effortlessly stabilize a hover and automatically match the cruising speed of a naval vessel, relieving pilots of the intense physical coordination once needed to prevent a mishap on a rolling flight deck.

Yet, military officials emphasize that the reduced physical burden of flying does not make the F-35 simple to operate. While the computerized fly-by-wire systems ease basic aerodynamic control, pilots are instead confronted with an unprecedented flood of tactical information, sensor feeds, and battlefield data that must be rapidly analyzed in real time.

The dramatic shift in pilot workload was summarized by Lt. Col. Michael Jones, the commanding officer of Marine Fighter Attack Squadron 211 and a former F/A-18 Hornet pilot. Jones observed that transitioning aviators were effectively moving from the delicate balancing act of riding a unicycle to the mechanically assisted dynamics of a bicycle.

To bridge the gap and overwrite decades of ingrained aviation habits, Marine pilots undergo extensive simulator profiles and continuous flight practice. By repeatedly running landing cycles under controlled conditions, former jump-jet pilots gradually replace their mechanical reflexes with the new inputs necessary to operate the Corps’ primary shipboard strike fighter.