The best method to stop a vessel from dragging anchor in a sand bottom is to（）.

To reduce mild fever the MOST useful drug is（）.

There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.

What happens to the efficiency of an anchor when it is moved from sand to mud?（）

There is not（）depth of water around the area centered at the lighthouse.

The term OIL as used in the Oil Pollution Regulations means（）.

In radiotelephone communications，the prefix PAN-PAN indicates that（）.

The radiotelegraph alarm signal is（）.

Tripping defects in anchors frequently occur in（）.

What is the（）of the turning circle in mavoeuvring?