Figure 1.

Pilot Participant Sleep During COVID-19 Humanitarian Missions. Sleep timing and sleep duration across COVID-19 humanitarian missions as measured by Zulu watch and sleep diary. (a) Pilots’ sleep episodes occurring across each mission hour as measured by Zulu watch compared to sleep diary reports of sleep during FDPs are depicted by color-matched thin (Zulu watch) and thick (diary) lines. FDPs are indicated by light blue boxes; local night is indicated by gray boxes. (b) Comparison of sleep duration as measured by Zulu watch and Zulu watch TST compared to diary sleep duration across all mission FDPs, layovers, and turnaround. * represents significance at p ≤ 0.05.