A Study for Optimum Survey Method of Underwater Structure Using the Dual Sonar Sensor

Table 3

No overlapping area exists.

Classification	Distance to the structure	Frequency	Shooting width	Towfish angle	Resolution grade
Towfish (R)	1.50 m	1250 kHz	16 m	R 45°	A
Towfish (L)	3.80 m	1250 kHz	16 m	L 10°
(a) Concept of Case  2 (no overlapping area)			(b) Case  2 sonar data