Fig. 6From: Acoustic water bottom investigation with a remotely operated watercraft survey systemThe results of acoustic bottom analyses obtained by using a 200 kHz acoustic source: a E1–roughness value, b E2–hardness value, and c peak SV–hardness value. The results are shown with colored solid circles 6 m in diameter (the area of scanning at a depth of 30 m, the average depth in this area)Back to article page