A、A.Dead in the water
B、B.1 knot
C、C.10 knots
D、D.15 knots
更多“You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later，the contact is 8 miles directly astern of you. What is the estimated speed of the contact? （）”相关的问题
A、when at anchor B、only when making way C、at any time when underway D、only when the identifying lights are not being shown
A、when at anchor B、only when making way C、at any time when underway D、only when the identifying lights are not being shown
A、straight overhead B、at the vessel whose attention you are trying to get C、into the wind D、about 60 degrees above the horizon
A、During an engine speed change B、During a navigational course change C、Unless the helm is in the“hand”mode D、All of the above
A、one blast，4 to 6 seconds in duration B、three blasts，4 to 6 seconds in duration C、one continuous blast until you are able to see around the bend D、one blast，8 to 10 seconds in duration
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