You are at sea on a vessel whose beam is 60 feet and full period of roll is 20 seconds. What is the estimated metacentric height of the vessel?
A. 1.3 ft B. 1.5 ft C. 1.7 ft D. 1.9 ft
A. 1.3 ft B. 1.5 ft C. 1.7 ft D. 1.9 ft
Daily License Questions about Ship Stability and Trim: I just think people need to have some knowledge in their heads, professional or otherwise. After 2007 our world has changed due to the advent of Smart Phones. Retaining knowledge is like being able to play a musical instrument, if you do not use it you will lose it! The questions I post with will hopefully help you keep what you already know or remind you of what you should know. William E. George
C 1.7FT
ReplyDelete1.74
ReplyDeleteTo answer this question you need to know the Rolling Period Formula:
ReplyDeleteGM = (0.44 x Beam in feet / Rolling Period in seconds)^2
GM = (0.44 x 60 / 20)^2 = 1.32 x 1.32 = 1.7424 feet
So the best answer is Choice C. 1.7 ft
CHARLEY 1.7 IS CLOSEST
ReplyDeleteGM =(.44B/T)^2
(.44*60/20)^2=1.7424 CHECK