Determine Hogging or Sagging Using Ship's Drafts | Causes & Importance
This video explains waht is hogging and sagging. It covers the importance of knowing it and how to determine if the ship is hog or sag through her drafts.
Hogging occurs when the ship’s middle portion (amidships) is lifted higher than its bow and stern. This happens when excessive weight is loaded at the fore and aft parts of the ship, causing the amidships section to rise. The uneven cargo distribution, with a large amount of weight concentrated toward the ends, increases buoyancy at amidships, leading to hogging.
Sagging is the opposite of hogging, occurs when the ship’s bow and stern rise, while the middle or amidships portion sinks lower. This happens when excessive weight is concentrated in the midsection of the ship, causing it to sink lower. Poor cargo distribution, such as heavy cargo stowed amidships, while the bow and stern remain light, reduces buoyancy at midship, leading to sagging.
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#hydrodynamics
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#seamanship
https://youtu.be/C5IC49f0Lwo
