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The vertical/Z axis, or yaw axis, is an imaginary line running vertically through the ship and through its centre of mass.A yaw motion is a side-to side movement of the bow and stern of the ship.
Dynamic trimming or dynamic trim optimization is an automated process used to control the trim of a large ship. The trim of a ship is the height difference between the draft of its hull. It represents the angle at which the ship is floating, relative to a designated water line.
A Boeing 737 uses an adjustable stabilizer, moved by a jackscrew, to provide the required pitch trim forces. Generic stabilizer illustrated. A horizontal stabilizer is used to maintain the aircraft in longitudinal balance, or trim: [3] it exerts a vertical force at a distance so the summation of pitch moments about the center of gravity is zero. [4]
If a cargo vessel (such as a tanker, bulk carrier or container ship) wishes to travel empty or partially empty to collect a cargo, it must travel "in ballast". This keeps the vessel in trim and keeps the propeller and rudder submerged. Typically, being "in ballast" will mean flooding ballast tanks with sea water.
The range of positive stability will be reduced to the angle of down flooding resulting in a reduced righting lever. When the vessel is inclined, the fluid in the flooded volume will move to the lower side, shifting its centre of gravity toward the list, further extending the heeling force. This is known as the free surface effect.
HOUSTON (Reuters) -U.S. President-elect Donald Trump plans to make it easier for some producers of liquefied natural gas (LNG) to seek export permit renewals, according to two sources with ...
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The U.S. federal government has rescinded its proposal to strengthen regulations on boat speeds along the East Coast. Fewer vessels will be required to reduce their speed, which is likely to ...