Stability

Question 1

Archimedes’ Principle

Answer 1

A ship that floats will be subject to an upward thrust equal to the weight of the immersed volume of water displaced

Question 2

Draft / Displacement questions

Answer 2

1. a draft can be found with a known displacement
   (D -> T)
2. a displacement can be looked up with a known draft
   (T -> D)

Question 3

Plimsoll mark

Answer 3

Load line: through 300 mm circle (= Summer draft)

Freeboard line: above the mark, indicates height of freeboard deck

Question 4

Calculating KG

Answer 4

Question 5

Stability moment and GM

Answer 5

Question 6

KM/KG/GM

Answer 6

KG: can be calculated in table of moments
(SUM weights * KG = SUM moments)

KM: for every draft in hydrostatic tables
(KMT = KM transverse = KM0)