单项选择题 Every existing product carriers of 40000 tons deadweight and above shall be provided with segregated ballast tanks and shall comply with the specified requirements，or，alternatively，operate with（）in accordance with the convention.

单项选择题 Each fireman’s outfit and its spare equipment on a tanker must be stowed in a(n)（）.

单项选择题 Each fire pump on a tanker must have a pressure gauge located at（）.