Kaplan, Sargent and Goodman 
© observed data 
—— estimated data 
2 
hye fcc) 
0 
9 10 12. U2 als) 14 1S 
t, sec. 
initial guess 
t, sec. 
initial guess 
5 initial guess 
t, sec. 
Figure 9 Comparison of trajectories (observed and estimated) and 
parameters of hydrofoil craft, computer generated data, 
1680 
