4 
Principle of MBES data acquisition 
Sound Speed Profile Error 
BUNDESAMT FÜR 
SEESCHIFFFAHRT 
UND 
HYDROGRAPHIE 
1) The measured Sound Speed 
Profile (55P) does not portray 
the current stratification of the 
water column. 
2) This results in ray-tracing 
and travel time errors... 
Sound Speed [m/s]. 
> A 
Depth error for +/- 0.3% mean sound speed profile error 
1} 
02) 
\ 
[ 
CH u Zu A 
Apam ancrıl- ** 
Ray 
Kai 
(OD 
Measured Re. 
/ 
/ rue! 
E 
I 
J— 
ml ( 
O 
"True' SSP 
Measured S5P' 
3) ...visible as 
'smileys' and 
YTrowns'. 
rue Battorm- 
Measereg SOltss