The DEEP DRILLER has a KGT of 52.90 feet while at a draft of 58.0 feet. List is 2.0 feet to port. What is the value of TCG?
⢠Transverse metacentric height (GM) and how it relates to list and TCG ⢠Use of the sine of the list angle in calculating TCG from known GM and list ⢠Sign convention for TCG to port vs. starboard (port negative, starboard positive)
⢠How do you convert a list in feet at the deck to an angle in degrees or radians, and why might that matter here? ⢠If you know GM and the angle of list, what simple relationship links them to TCG? Think about the right triangle formed by G, M, and the centerline. ⢠Based on typical stability sign conventions, should a list to port produce a positive or negative TCG value?
⢠Be sure you are using the correct trigonometric function (sine vs. tangent) for small list angles in this type of GM/TCG problem. ⢠Confirm the sign convention: port list usually means a negative TCG, starboard list a positive TCG. ⢠Doubleâcheck that youâve used the given KGT (GM) correctly and not confused it with KG or KM.
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