HARBOR TUGS AROUND THE WORLD: Spot the Differences! ⚓ Caught this Japanese harbor tug working in the port , and it made me realize how different harbor tugs look depending on which country you're in! Even though they all do the same basic job—helping massive ships dock, undock, and maneuver safely in tight harbor spaces AMERICAN HARBOR TUGS: Powerful and practical, with massive engine rooms relative to their size. US harbor tugs prioritize high bollard pull (pulling power) and often feature tall