I'm sure you've gotten my PM by now.
While not a completely reliable image, this should give your an idea of what i meant, this is San Francisco, 1846:
Ships unload at the wharf, but moor in the harbor or the shores of the roadstead.
Another image of not entirely accurate representation, nevertheless, note the many small craft plying the waters between the ships, in New Amsterdam, c. 1650:
This image is actually quite reliable, and gives an idea of the types of small craft used to unload vessels, delivery chandlery, deliver and return pilots, and ferry crew and passengers to and from ships in the harbor, once again this New York, sadly, the image is of the slave market in the late 17th century: