RE EE 
  
  
  
  
  
“Vw 
within the framework of fundamental inertial navigation 
characteristics — such as Schuler behaviour and heading 
sensitivity. 
Camera shutter control to produce "one photo = one map sheet" 
and "pin-pointed symphotblocks". 
Rhumb line (loxodrome ) navigation instead of great circle 
navigation 
Track guidance and simplification of pattern definition. 
Diagram of the system, see figure 9 
From the propagation of update data into velocity and acceleration 
corrections a significant improvement in navigational performance (& 
is expected: after several oriented updates, the future error 
behaviour of the navigation system should be predictable . so as 
to maintain an error rate of no more than 0.12 nm per hour. 
Actual performance tests are made  .; it is expected that - before 
the 1980 ISP congress - it will be known whether this accuracy 
is realistic, in actual survey flights. 
(9