29. Reference line is a line _____ on the radar screens in VTS Centers and/or electronic seacharts
separating the fairway for inbound and outbound vessels so that they can safely pass each
other.
(A) disappeared
(B) appearance
(C) displayed
(D) setting
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統計: A(19), B(48), C(416), D(41), E(0) #1764739
統計: A(19), B(48), C(416), D(41), E(0) #1764739