The basins should not be curved as this makes berthing inconvenient. Convex quays for larger ships are only practical when floating fenders or other contrivances are used.

港地不能是弧形的，因为弧形的港地船只不便停靠。用于停泊大型船只的凸形堤岸式码头只有在有沉浮式防冲材或者其他设施的情况下才能使用。