On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.

In most cases，the direction of the apparent wind lies between the bow and（）.

Advection fog is most commonly caused by（）.

The edge of a hurricane has overtaken your vessel in the Gulf of Mexico，and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the（）.

The apparent wind can be zero when the true wind is from（）.

The presence of stratus clouds and a dying wind will usually result in（）.

In the Northern Hemisphere，your vessel is believed to be in the direct path of a hurricane，and plenty of sea room is available. The best course of action is to bring the wind on the（）.

The currents are（）mosoonal origin．

The direction of the surface wind is（）.

In the Northern Hemisphere，a wind that shifts counterclockwise is a（）.