Question 2267Deck Safety70% to pass
In order to calculate the TPI of a vessel, for any given draft, it is necessary to divide the area of the waterplane by which of the following?
AI Explanation
The correct answer is D) 420.
To calculate the Tons Per Inch (TPI) of a vessel, you need to divide the area of the waterplane by 420. This is a standard formula used in naval architecture and shipbuilding to determine how much the vessel's draft changes with changes in weight.
The other answer choices are incorrect because they do not accurately represent the divisor used in the TPI calculation. A, B, and C are arbitrary numbers that do not have a direct relationship to the waterplane area or the calculation of TPI.
Related Questions
#2265 You are loading in a port subject to the tropical load line mark and bound for a port subject to the summer load line mark. You will enter the summer zone after steaming two days. You will consume 28 tons of fuel, water, and stores per day. The hydrometer reading at the loading pier is 1.020, and the average TPI is 55. What is the minimum freeboard required at the start of the voyage? Reference Table BL-0021 below. #2266 Your vessel has a forward draft of 26'-11" and an after draft of 29'-07". How many tons of cargo can be loaded before the vessel reaches a mean draft of 28'-06" if the TPI is 69? #2268 A vessel's mean draft is 29'-07". At this draft, the TPI is 152. The mean draft after loading 1360 tons will be _______________.#2269 A bulk freighter 680 ft. in length, 60 ft. beam, with a waterplane coefficient of .84, is floating in salt water at a draft of 21'. How many long tons would it take to increase the mean draft by 1"? #2270 A vessel's drafts are: FWD 14'-04", AFT 15'-08". How much more cargo can be loaded to have the vessel down to the freeboard draft? (Use the information in Section 1, the blue pages, of the Stability Data Reference Book)