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Wet or dry mass for calculating virtual mass of a towed object?

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Old   June 16, 2009, 09:56
Default Wet or dry mass for calculating virtual mass of a towed object?
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I would like to calculate the virtual mass (actual mass plus added mass) of a towed object, including the lines used to tow it. I'm calculating the mass of each component and summing them up. Do I use the wet rather than dry mass? If so, does it matter that a section of line is buoyant, so its wet mass is negative? [I guess it still requires force to tow it because its added mass is positive, but the concept is confusing.]
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added mass, hydrostatics, towing, virtual mass

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