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Fig. 2 | BMC Public Health

Fig. 2

From: Flight crew fatigue risk assessment for international flights under the COVID-19 outbreak response exemption policy

Fig. 2

SAFE model simulation predictions for the 4 am flight schedule under the exemption and the CCAR-121 policies, with A and B showing the outbound (manned by flight crews a and b) and return (manned by flight crews c and d), respectively, and C and D showing the outbound and return (both manned by flight crews m and n). A comparison of A and C shows the fatigue risk for flight crews flying under the exemption approach and CCAR-121 regulations on outbound flights. A comparison of B and D shows a comparison of the fatigue risk for flight crews flying under the exemption approach and CCAR-121 regulations on return trip flights. Note: The meaning of the level of risk represented by the different colours is determined by Table 3. PVG stands for Shanghai Pudong International Airport; FRA stands for Frankfurt International Airport; CKG stands for Chongqing Jiangbei International Airport; AMS stands for Amsterdam International Airport. The number at the end of the duty refers to the number of segments flown during the time on duty

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