A、Flashing red lights upstream and fixed red lights downstream
B、Yellow unlighted buoys
C、Signs and/or flashing red lights
D、Red daymarks upstream and green daymarks downstream
更多“Restricted areas at locks and dams are indicated by（）.”相关的问题
A、enter a traffic separation zone B、cross a submerged pipeline C、depart a regulated area D、depart a restricted area
A、only at night B、only during restricted visibility C、at night and during restricted visibility D、at all times
A、flashing red lights upstream and fixed red lights downstream B、yellow unlighted buoys C、signs and/or flashing red lights D、red daymarks upstream and green daymarks downstream
A、The ABR must have multiple interfaces connected to the backbone areA B、An ABR is a router with two interfaces, each connected to a different nonbackbone areA C、The only requirement to be considered an ABR is at least one interface connected to the backbone areA D、An ABR must have at least one interface in the backbone area plus at least one other interface in a nonbackbone areA
A、in sight of one another in fog B、navigating in or near an area of restricted visibility C、only if they are showing special purpose lights D、only if they have operational radar
A、A.by long distance B、B.by the darkness at night C、C.by a vessel in front D、D.by fog or falling snow
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