You have 520 tons of below deck tonnage including liquid mud. Your existing deck cargo is 160 tons with a VCG above the deck of 2.7 feet. What is the maximum cargo tonnage you are permitted to load? See illustration D036DG below.
• Use the USCG stability loading diagram D036DG: below-deck tonnage is on the horizontal axis; allowable deck cargo is on the vertical axis. • The curve on the diagram separates SAFE LOADING from UNSAFE LOADING; you must stay on or below the safe side of the curve. • The letter limits deck cargo VCG (vertical center of gravity) to 3.0 ft above deck; compare this with the given VCG of 2.7 ft.
• Where do you plot the point that represents 520 tons of below-deck load and your total deck cargo on the diagram? • After reading the maximum allowable deck cargo from the curve at 520 tons below-deck, how do you use your existing 160 tons on deck to find how much more you may load? • Does a VCG of 2.7 ft require you to reduce the value you read from the diagram, or can you use it directly? Why?
• Be sure you are reading long tons of deck cargo from the vertical axis that corresponds to 520 long tons of below-deck load on the horizontal axis. • Confirm that you are solving for additional cargo that can still be loaded on deck, not the amount already on board. • Verify that the VCG limit is 3.0 ft above deck on the stability letter and that the given 2.7 ft is within this limit.
No comments yet
Be the first to share your thoughts!