posted 08-28-2014 12:54 PM ET (US)

Re the boat having deeper draft:The five additional people had an average weight of 160-lbs, for a total added load of 800-lbs above our normal cruising weight. That is 363.6-kilograms

This extra weight must be buoyed by displacement of additional water. The density of freshwater at 70-degrees is about 998.2-kilograms/cubic-meter. This suggests that a volume of water equal to

363.6-kilograms x 1-cubic-meter/998.2-kilograms = 0.364-cubic-meter

must be displaced to create the addition buoyant force.

If we consider the hull form of the boat to be a simple box, we can figure the added depth as follows:

length = 24-feet, or 7.315-meter

width = 7.4-feet, or 2.26-meter

This gives an area of 16.5-square-meter. To create a volume of 0.368-cubic-meter, this square would only need to be 0.022-meter deep.

If we figure that the hull form is not a square but a triangular prism with 18-degree deadrise angle, we can figure it will need to be twice as deep, or 0.044-meters. Converting that to inches is roughly 1.75-inches.

If the boat runs with 1.75-inches more hull in the water, could you easily detect this by the size of the wake?