单项选择题
Safe speed is defined as that speed where（）.
A.you can stop within your visibility range B.the vessel is not subject to vibrations C.you are traveling slower than surrounding vessels D.you can take proper and effective action to avoid collision
单项选择题 RYC8/TKS PLSPROCEED PEAKIS MEET/PLT SHIFT W/ANCH FOR/QTINE THEN/TO E/ANCH FOR/SUPPLY. This telex indicates that（）.
单项选择题 Risk of collision exists when an approaching vessel has a(n)（）.
单项选择题 On a gnomonic chart，a great circle track between Los Angeles and Brisbane will appear as a （）.
