In a simple system of 5 ports along a coast, the traffic for each port is the same for case A, so there is no concentration and, thus, no inequality. The Lorenz curve of this distribution is the same as the perfect equality line; they overlap. In case B, there is some traffic concentration in two ports, which is reflected in the Lorenz curve as it differs from the perfect equality line. Case C represents a high concentration level in two ports, and the Lorenz curve significantly differs from the perfect equality line.