Table 8 Comparison of PVT data for flight crews operating under the two policies (Mean ± standard deviation \(\overline{\mathrm{x}}\) ± s)

Early morning(4:00)

Take-off/landing

–

Pre

SF-E

R-E

Post

Pre

SF-E

R-E

Post

Exemption policy (Group a flies the outbound trip; Group c flies the return trip)

1.30 ± 0.05

1.14 ± 0.04

1.00 ± 0.12

0.85 ± 0.07

0.98 ± 0.13

0.83 ± 0.07

0.89 ± 0.09

0.77 ± 0.07

CCAR-121(Group m flies the round trip)

1.43 ± 0.07

1.16 ± 0.08

1.05 ± 0.16

0.84 ± 0.09

1.18 ± 0.11

1.03 ± 0.13

0.90 ± 0.09

0.84 ± 0.10

Cruising

–

Pre

SF-S

SF-E

Post

Pre

SF-S

SF-E

Post

Exemption policy (Group b flies the outbound trip; Group d flies the return trip)

1.48 ± 0.06

1.33 ± 0.10

1.09 ± 0.20

1.00 ± 0.09

1.12 ± 0.10

0.96 ± 0.09

1.07 ± 0.05

0.92 ± 0.11

CCAR-121(Group n flies the round trip)

1.44 ± 0.07

1.28 ± 0.08

1.13 ± 0.08

0.92 ± 0.08

1.06 ± 0.10

0.96 ± 0.08

0.96 ± 0.06

0.88 ± 0.08

Noon(12:00)

Take-off/landing

–

Pre

SF-E

R-E

Post

Pre

SF-E

R-E

Post

Exemption policy (Group e flies the outbound trip; Group g flies the return trip)

1.40 ± 0.06

1.28 ± 0.08

1.13 ± 0.08

0.98 ± 0.06

1.18 ± 0.05

1.05 ± 0.06

0.96 ± 0.08

0.85 ± 0.12

CCAR-121(Group o flies the round trip)

1.34 ± 0.09

1.25 ± 0.05

1.02 ± 0.06

0.96 ± 0.09

1.21 ± 0.07

1.13 ± 0.09

1.04 ± 0.08

0.92 ± 0.13

Cruising

–

Pre

SF-S

SF-E

Post

Pre

SF-S

SF-E

Post

Exemption policy (Group f flies the outbound trip; Group h flies the return trip)

1.41 ± 0.07

1.32 ± 0.06

1.19 ± 0.06

1.04 ± 0.08

1.15 ± 0.07

1.11 ± 0.09

1.05 ± 0.07

0.95 ± 0.08

CCAR-121(Group p flies the round trip)

1.40 ± 0.07

1.31 ± 0.10

1.14 ± 0.07

1.03 ± 0.08

1.17 ± 0.11

1.10 ± 0.06

1.04 ± 0.05

0.93 ± 0.08

Evening(20:00)

Take-off/landing

–

Pre

SF-E

R-E

Post

Pre

SF-E

R-E

Post

Exemption policy (Group i flies the outbound trip; Group k flies the return trip)

1.40 ± 0.10

1.28 ± 0.09

1.10 ± 0.06

0.94 ± 0.08

1.02 ± 0.05

0.92 ± 0.06

0.88 ± 0.07

0.83 ± 0.09

CCAR-121(Group q flies the round trip)

1.39 ± 0.07

1.26 ± 0.05

1.11 ± 0.09

0.98 ± 0.10

1.01 ± 0.16

0.98 ± 0.10

0.91 ± 0.08

0.83 ± 0.07

Cruising

–

Pre

SF-S

SF-E

Post

Pre

SF-S

SF-E

Post

exemption policy (Group j flies the outbound, Group l flies the return trip)

1.45 ± 0.05

1.31 ± 0.06

1.20 ± 0.08

1.05 ± 0.05

1.02 ± 0.03

0.93 ± 0.06

0.85 ± 0.10

0.84 ± 0.09

CCAR-121(Group r flies the round trip)

1.45 ± 0.07

1.34 ± 0.06

1.18 ± 0.08

1.02 ± 0.07

1.02 ± 0.14

0.97 ± 0.10

0.89 ± 0.077

0.88 ± 0.09