单选题A vessel is in sight of another vessel when（）.Ashe can be observed by radarBshe can be observed visually from the other vesselCshe can be plotted on radar well enough to determine her headingDher fog signal can be heard
单选题
A vessel is in sight of another vessel when（）.
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
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