and often render navigation extremely dangerous.

_The Ox-Eye_, so called by seamen, is a remarkable appearance in the
heavens, resembling a small lurid speck, and always precedes two
particular storms, known only between the tropics.

_Azimuth-Compass_ is an instrument employed for ascertaining the sun's
magnetical azimuth.

_Studding-Sails_ are long and narrow, and are used only in fine weather,
on the outside of the large square sails.

_Stay-Sails_ have three corners, and are hoisted up on the stays when
the wind crosses the ship.

_Broaching-to_ is a sudden movement in navigation, when the ship, while
scudding before the wind, accidentally turns her side to windward.

_Wales_ are a number of strong and thick planks, covering the lower part
of the ship's side.

_Scud_ is a name given by sailors to the lowest clouds; which are mostly
observed in squally weather.

_The Sheets_ are ropes used for extending the clues, or lowering the
corners of the sails.

_Brails_ are ropes used to truss up a sail to a mast or yard.

_Reef-Bands_ are long pieces of rough canvass sewed across the sails to