单项选择题 At least（）two-way VHF radiotelephone apparatus shall be provided on every cargo ship of 300 tons gross tonnage and upwards but less than 500 tons gross tonnage.

单项选择题 Every lifeboat which is fitted with a fixed two-way VHF radiotelephone apparatus with（）which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in is operating position.

单项选择题 Every lifeboat which is fitted with a fixed（）VHF radiotelephone apparatus with an antenna which is separately mounted shall be provided with arrangements for sitting and securing the antenna effectively in its operating position.