Immediately upon abandoning the vessel
Only when there is a chance of their being seen by a rescue vessel
At one hour intervals
At half hour intervals
第1题：
第2题：
a sponge used to mop up and store condensation must be kept salt free
only condensation on the bottom of the canopy should be collected
it should be strained through a finely woven cloth
chlorine tablets should be used to make it drinkable
第3题：
In the event of fire in a machinery space，______.
A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failed
B.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishment
C.water in any form should not be used as it will spread the fire
D.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
第4题：
Heat-resistant
Rubber gloves
PVC gloves
Leather gloves
第5题：
No action is necessary，as the DSC control unit will automatically switch to the NBDP follow-on communications frequency
The operator should immediately set continuous watch on the radiotelephone frequency that is associated with the frequency band on which the distress alert was received
The Operator should immediately set continuous watch on VHF channel 70
The Operator should immediately set continuous watch on the NBDP frequency that is associated with the frequency band on which the distress alert was received
第6题：
Which IPsec security protocol should be used when confidentiality is required?（）
第7题：
Only when there is a chance of their being seen by rescue vessels
At half hour intervals
At one hour intervals
Immediately upon abandoning the vessel
第8题：
When collecting condensation for drinking water，______．
A.A sponge used to mop up and store condensation must be kept salt free
B.Only condensation on the bottom of the canopy should be collected
C.It should be strained through a finely woven cloth
D.Chlorine tablets should be used to make it drinkable
第9题：
identity
identical
identify
identification
第10题：
straight overhead
at the vessel whose attention you are trying to get
into the wind
about 60 degrees above the horizon