celestial sphere - An imaginary sphere surrounding the globe that contains the sun, moon, stars and planets.
center line - The imaginary line running from bow to stern along the middle of the boat.
The point of the celestial sphere which is directly overhead.
Zephyr
A gentle breeze. The west wind.
Zenith-The point of the celestial sphere which is directly overhead.
Zephyr-A gentle breeze. The west wind.
Zodiac-Trade name for inflatable boat.
Zula time --GMT- Greenwich Meridian Time, also known as Universal Time ...
A two-masted sailboat similar to a ketch, but with a smaller aftermast (mizzen or jigger) stepped abaft the tiller or wheel; a yawl's mizzen is smaller than a ketch's, as well as being placed farther aft. zenith The part of the celestial sphere ...
 See also: Point, Sailing, Boat, West, Wind
  
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