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A.she can be observed by radar
B.she can be observed visually from the other vessel
C.she can be plotted on radar well enough to determine her heading
D.her fog signal can be heard

A.her gear extends more than 100 meters from the vessel
B.she is using any type of gear，other than lines
C.she is using fishing apparatus which restricts her maneuverability
D.she has any fishing gear on board