136 
/Compare\ piausiwny / Assess \ 
SOGX w ! data and piemen’ w / result of usab,i ' | v 
criteria / 
i 5.1.1.3.1 / 
/Selection \ 
^ result ot j ^ ; of data to be 1_ 
v comparison ! 
.5.1.1.3.2 , 
\ provided j 
v 5.1.1.3.3\J 
> 
DFD 5.1.1.3: Speed over ground ahead 
DFD 5.1.1.4: Transverse speed over ground 
DFD 5.1.1.5: Speed through water ahead