Question 4730Deck General70% to pass
A semisubmersible, 200 feet in length between draft marks with the LCF 10 feet aft of amidships, records the following drafts: Port Forward 64'-9"; Port Aft 68'-9"; Starboard Forward 59'-9"; and Starboard Aft 63'-9". What is the true mean draft?
AI Explanation
The correct answer is B) 64.45 feet.
To calculate the true mean draft, you need to find the average of the four recorded drafts. The formula for this is:
True Mean Draft = (Port Forward + Port Aft + Starboard Forward + Starboard Aft) / 4
Plugging in the given values:
True Mean Draft = (64'-9" + 68'-9" + 59'-9" + 63'-9") / 4
= 256'-9" / 4
= 64.45 feet
The other options are incorrect because they do not properly calculate the average of the four recorded drafts. Option A) 64.25 feet and Option C) 64.75 feet are incorrect calculations, while Option D) 64.90 feet is too high based on the information provided.
Related Questions
#4728 A semisubmersible at a draft of 19 feet 9 inches arrives on location planning to deploy eight mooring lines. Each anchor weighs 15 long tons and each mooring line consists of 3,000 feet of 3-inch chain (89.6 lbs/ft). If no ballast corrections are made, what is the expected draft if the average TPI is 60? #4729 A semisubmersible, 200 feet in length between draft marks with the LCF 10 feet aft of amidships, records the following drafts: Port Forward 64'-09"; Port Aft 68'-09"; Starboard Forward 59'-09"; and Starboard Aft 63'-09". What is the list? #4731 With no environmental forces on the DEEP DRILLER, the average of the forward drafts is 61.0 feet, and the average of the aft drafts is 59.0 feet. KGL is 51.13 feet. What is the value of LCG? #4732 For a MODU with longitudinal inclination, an increase in GML causes _______________.#4733 The DEEP DRILLER, loaded as shown in Sample Load Form #4 (Drilling), suffers major damage which results in flooding in tank C3S. Your best countermeasure is to _______________.