单项选择题
A.use English language B.always use the International Code C.preface it by the word SOS D.follow the transmission with the radio alarm signal
A person who sees someone fall overboard should（）.A.cal...
单项选择题A person who sees someone fall overboard should（）.
A.call for help and keep the individual in sight B.run to the radio room to send an emergency message C.immediately jump in the water to assist the individual D.go to the bridge to report the captain
（）is the most visible signal of distress from a lifeboa...
单项选择题（）is the most visible signal of distress from a lifeboat at sea in the daytime.
A.Smoke signal B.Flash signal C.Fire signal D.Radio emergency transmission
Which signal is recognized as a distress signal?（）.A.Di...
单项选择题Which signal is recognized as a distress signal?（）.
A.Directing the beam of a searchlight at another vessel B.A smoke signal giving off orange colored smoke C.A whistle signal of one prolonged and three short blasts D.International Code Signal PAN spoken over the radiotelephone
