While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered during daylight hours in good visibility and clear of any navigational hazards，the lookout may be（）.<br>A:the helmsman<br>B:the mate on watch<br>C:Either A or B<br>D:Neither A nor B

While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered during daylight hours in good visibility and clear of any navigational hazards，the lookout may be（）.
A:the helmsman
B:the mate on watch
C:Either A or B
D:Neither A nor B

出自：海船船员证

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