Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.<br>A:Spare charges shall be carried for at least 50 percent of each size and variety required on board<br>B:If the unit cannot be charged by the vessel's personnel，one spare unit shall be carried in lieu of spare charges<br>C:Spare charges shall be stowed in watertight containers on deck<br>D:Regulations concerning spare charges do not apply to unmanned barges

Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.
A:Spare charges shall be carried for at least 50 percent of each size and variety required on board
B:If the unit cannot be charged by the vessel's personnel，one spare unit shall be carried in lieu of spare charges
C:Spare charges shall be stowed in watertight containers on deck
D:Regulations concerning spare charges do not apply to unmanned barges

出自：海船船员证

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