Freeboard is measured from the upper edge of the（）.

Pollution regulations require that each scupper in an enclosed deck area have a（）.

A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.

A wildcat is a（）.

To determine the weight capacity of a deck in a cargo hold，you would refer to the（）.

The opening in the deck that leads the anchor cable outside the hull is the（）.

Fuel oil tank vents are fitted with a screen which will stop（）.

The perforated，elevated bottom of the chain locker，which prevents the chains from touching the main locker bottom and allows seepage water to flow to the drains，is called a（）.

The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.

The Tonnage Certificate indicates（）.