单项选择题
On cargo and miscellaneous vessels what is NOT a required part of the fireman’s outfit?（）
A.Self-contained breathing apparatus with a lifeline attached B.Combustible gas indicator C.Rigid helmet，boots，and gloves D.Flame safety lamp
单项选择题 On a vessel making a voyage more than 48 hours long，regulations require that（）.
单项选择题 On a small boat，which knot is best suited for attaching a line to the ring of an anchor?（）
单项选择题 On a ship，when may a work vest be substituted for a required life preserver?（）
