Figure 2-16: ECDIS screen, with AIS 2 minutes speed vector displayed

Figure 2-17: OpenCPN screen, UTC 1514 hours with 6 minutes speed vector.

Figure 2-18: OpenCPN overlapped on ARPA screen, UTC 1514 hours

Figure 2-19: Radar echo with 3 min trail presentation, relative motion, off Centre. 

Figure 2-20: 20 meters boat, two mast sail boat, three side windows power boat.

Figure 2-21: meeting situation by RB or relative position of target vessel

Figure 2-22: vessels obligations in collision avoidance varied by distance

Figure 2-23: Possible RB of different speed vessels have collision risk

Figure 2-24:  As chapter 1 Figure 19 SANCHI’s X band radar display at 1939LT