Sticking to yesterday's harbour theme. The left hand boat (the yellow one for those who don't know their left from their right) is the harbour pilot boat while the right hand one is one of the Port Elizabeth Harbour's tugs. The pilot boat takes the harbour pilot out to the big ships. The pilot then steers the ship into the harbour and not the ship's actual captain. The tugs are the boats that push and pull the big ships into place along the quay side.