11 
Performance of attitude functions. 
ATT 10 
ATT 11 
ATT 12 
ATT 13 
ATT 14 
ATT 15 
Level bubble 
(Using element ATT 1) approx. 1& 
Solar periscope 
(Using ATT 8) 5 C 
Vertical gyro, basic type, forced to verticality 
and integrating the aircraft's accelerations 
(Using ATT 2, 3,4, 5, 6) 30°... 50° 
Precision vertical rate gyro 
(Using ATT 2, 3, 4, 5, 6) approx. 15 c 
Inertial platform and inertial vertical 
(Using ATT 3,4, 5, 6 and 9). 3^ 
Horizon Camera 
(Using ATT 7) 
in good visibility 2 C 
in medium visibility 6 C 
medium to poor visibility = 
INVESTMENT 
1.000.000 
US $ 
100.000 
10.000 
1000 
100 
10 
1 
/, 
/ 
COST OF 
VERTICALITY 
INFORMATION 
/ 
Inertial control /• 
Solar periscope 
i 
Gyro control • 
Horizon camera 
/ 
/ 
Level bubble • 
/ 
PERFORMANCE 
sexagesimal degs & mins 
centesimal grads & centigrads 
10* 
10° 
is 
1° 
10 c 
30 
10' 
3 
1