Question 4275Deck General70% to pass
The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Weather conditions require ballasting to survival draft. Assume that 4087 long tons of ballast are added at an average VCG of 8.32 feet, and upon arrival at 45 feet, port and starboard ballast tanks 1, 3, and 8 are slack. What is the new KGL?
AI Explanation
The correct answer is C) 55.16 feet.
The key is that adding 4087 long tons of ballast at an average VCG of 8.32 feet changes the vessel's overall center of gravity, which is represented by the new KGL (vertical center of gravity from the keel). By using the given information and the principles of stability calculations, the new KGL can be calculated to be 55.16 feet.
The other answer choices are incorrect because they do not accurately reflect the new KGL after the ballasting operation described in the problem. Calculating the change in KGL is a standard stability calculation that is essential knowledge for the US Coast Guard Captain's License Examinations.
Related Questions
#4273 While on a normal tow, the COASTAL DRILLER is threatened with the approach of a severe storm. Including the time required to place the generators on-line, the approximate time required to lower the legs from a TOC (tip-of-can) position of 1.20 feet to 60.50 feet is _______________.#4274 While loaded as shown in Sample Load Form #5 (Survival), an estimated 250 long tons of snow and ice accumulates on the DEEP DRILLER at an estimated height of 127 feet. Assuming no corrective ballasting, what is the rise in the height of the center of gravity corrected for longitudinal free surface effects? #4276 The COASTAL DRILLER, when underway was loaded as shown in Sample Load Form #1 (Rig Move). It is now preloaded at minimum air gap waiting for all settling to take place. The preload, weighing 7,191.7 kips, has LM 870,196 ft-kips and TM 2,158 ft-kips. What is the starboard leg reaction? #4277 Standards for fabrication and testing of chain on mobile offshore drilling units are provided by the _______________.#4278 In storm conditions, with the wind and waves from the port bow of the DEEP DRILLER in 600 feet water depth, the offset is 9%. Completely slacking mooring lines 5 and 6 reduces the offset to _______________.