单项选择题
Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.
A.kept on board no more than 2 years B.inspected and serviced every 6 months C.destroyed if more than 5 years old D.maintained in good and serviceable condition
单项选择题 Lines passed around the falls to hold the boat while passengers are boarding are（）.
单项选择题 Life preservers should be stowed in（）.
单项选择题 Life jackets should be marked with the（）.
