A、is ready to use but vessels must stand clear
B、is ready to use and vessels may approach
C、cannot be made ready immediately and vessels shall stand clear
D、cannot be made ready immediately but vessels may approach
更多“A flashing red light displayed at a single lock means that the lock（）.”相关的问题
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、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、Black and white stripes with an interrupted quick flashing light B、Black and red stripes with a Morse (A) light C、Black and red stripes with an interrupted quick flashing light D、Red and white stripes with a Morse (A) light
A、fixed red light B、Morse (A) white light C、composite group-flashing light D、yellow light
A、white light whose characteristic is Morse (A) B、group-occulting white light C、composite group-flashing (2 + 1) white light D、composite group-flashing (2 + 1) red or green light
A、must be lighted B、may have a flashing red light C、may have a fixed white light D、None of the above
客服
TOP
查看正确答案
