A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.

单项选择题A fishing vessel displaying the lights shown is（）.

A.anchored
B.underway but not fishing
C.tending a small fishing boat
D.fishing by trawling

单项选择题A fishing vessel casualty must be reported to the Coast Guard if it involves（）.

A.loss of life
B.an injury requiring only first aid
C.$(SA)10，000 in property damage
D.loss of equipment which doesn't reduce the vessel's maneuverability

单项选择题A fire pump may be used for other purposes if（）.

A.the other services are run off a reducing station with a pressure gage
B.one of the required pumps is kept available for use on the fire main system at all times
C.no relief valves are installed
D.all of the above conditions are met

单项选择题A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should（）.

A.remain on course and hold speed
B.remain on course but slack the speed
C.change course to put the wind on either beam and increase speed
D.change course and put the stern to the wind

单项选择题A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.

A.comes over the bow
B.blows the fire back toward the vessel
C.comes over the stern
D.comes over either beam