Written by Source: Journal – Cognition, Technology, & Work on Springer.com
By Daan Vlaskamp, Alex Pollitt, James Blundell, Annemarie Landman, Eric L. Groen, M.M. René van Paassen, Olaf Stroosma & Max Mulder.
This study by Vlaskamp and colleagues investigates how often startle and surprise events occur in helicopter operations, how pilots respond, and what mitigation strategies are currently used or could be adopted to enhance safety.
Startle and surprise—defined as sudden, unexpected stimuli that trigger a stress response—are known to impair decision-making, situational awareness, and performance in high-risk aviation environments. While significant research and mitigation techniques (like startle management methods) have been developed for fixed-wing airline operations, little was previously known about their prevalence or mitigation in rotary-wing contexts.
Using a survey of 234 helicopter pilots, the authors found that 96 % had experienced impactful startle and/or surprise events during flight, with common scenarios including disorientation, inadvertent IMC, and tail rotor events. Levels of perceived stress and mental effort during these events were high and did not vary significantly with pilot experience or military vs civilian training background, suggesting startle and surprise are pervasive challenges irrespective of background or flying hours.
Only 38 % of pilots reported any formal training for dealing with these events, and a mere 1 % were trained in breathing-based techniques, highlighting a significant gap in structured mitigation. However, 90 % expressed opennessto implementing dedicated startle management methods such as the “Aviate, Breathe, Check (ABC)” mnemonic, although many cited time pressure as a barrier.
The paper’s significance lies in documenting that startle and surprise are near-universal experiences in helicopter flying and that current mitigation is largely informal. This underscores the need for heli-specific training methods rooted in human factors science, potentially adapted from fixed-wing practice but tailored to the unique time-critical, low-altitude demands of helicopter operations.
Here are practical interventions and training design implications drawn directly from the findings of Startle and surprise in helicopter operations, framed for helicopter operators, trainers, and HF specialists:
Recommendations arising from the study:
1. Make startle/surprise a deliberate training objective
The near-universal exposure reported by pilots supports treating startle and surprise as core operational hazards, not edge cases. Training syllabi should explicitly include startle management objectives alongside TEM and decision-making.
2. Integrate startle into scenario-based simulator training
Rather than adding standalone “startle lessons,” embed unexpected events into line-oriented helicopter scenarios (e.g. inadvertent IMC, sudden automation changes, tail rotor anomalies). The focus should be on initial cognitive control and prioritisation, not just technical recovery.
3. Teach simple physiological regulation techniques
The lack of exposure to breathing-based techniques is a clear gap. Short, repeatable methods (e.g. controlled breathing paired with a stabilisation mnemonic) can be taught quickly and reinforced during simulator sessions to reduce cognitive tunnelling and regain executive control.
4. Reinforce “pause–stabilise–prioritise” mental models
Time-critical helicopter environments make lengthy checklists unrealistic during startle. Training should reinforce compressed cognitive scripts (e.g. aviate → stabilise → diagnose) that align with rotary-wing operational realities.
5. Normalise discussion of startle in CRM
Pilots’ openness suggests cultural readiness. CRM debriefs should explicitly address emotional and cognitive responses, not just actions taken. This helps reduce stigma and improves shared mental models across crews.
6. Adapt fixed-wing methods—don’t copy them
While fixed-wing startle research offers useful tools, helicopter training must reflect low-altitude, high-workload, and single-pilot contexts, particularly in HEMS, SAR, and offshore operations.
Abstract:
Startle and surprise can impair pilot performance and affect flight safety. This study investigates the prevalence of different startle and surprise events among helicopter pilots, its impact on pilot stress and mental effort and the influence of training background. It also looks at currently used startle mitigation strategies and evaluates the usability of a previously proposed “Aviate, Breathe, Check (ABC)” startle management method (Piras et al. 2023). A survey among 234 helicopter pilots revealed that 96% had experienced impactful startle or surprise events during operations. Scenarios such as disorientation, tail rotor incidents, and flight into instrument meteorological conditions (IMC) were considered particularly stressful. Reported levels of stress and mental effort during startle and surprise events did not differ between pilots with higher and lower experience levels or between pilots with a different training background (military or civilian). Only 38% of pilots indicated they were specifically trained to deal with startle and surprise and only 1% were trained to use a breathing technique. Most pilots (90%) expressed openness to implementing the ABC method and expected benefits from using it. Concerns regarding time constraints in critical situations emerged as the primary objection to adopting this technique. Overall, the findings indicate that the introduction of a startle management method tailored for helicopter operations could significantly enhance safety, especially given the higher accident rates compared to fixed-wing operations. Future research should focus on developing effective training protocols that account for the unique challenges of helicopter flying.