The dangerous semicircle of a typhoon in the Southern Hemisphere is that area（）.

The port State control officer or the surveyor authorized by the port State Administration must be aware that（）may be carried on product carriers.

The damage to a vessel is over $25，000. Who must notify the nearest Coast Guard Marine Safety or Marine Inspection Office as soon as possible? （）

The dew point is reached when the（）.

The disadvantage of using a heaving line to pass a towline is that（）.

What does the DSC control unit do if the GMDSS radio operator fails to insert updated information when initiating a DSC distress alert（）.

While proceeding to a distress site，you hear the words “Seelonce mayday” on the radiotelephone.Which action should you take（）.

The port State control officer will ensure that（）is performed by all crude carriers either required to have a crude oil washing system or where the owner or operator chooses to install a crude oil washing system.

The complete details of a crude oil washing system aboard your vessel，including the operating sequences and procedures，design characteristics，a description of the system，and required personnel will be found in the（）.

The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.