单项选择题
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.A member of the engineering watch B.A member of the navigational watch C.A member of the Stewards Department D.All of the above
A.Obeys the Pilot B.Obeys the Master C.Asks you for instructions D.Brings the rudder to a point midway between the two conflicting positions