From the novel The Old Man and the Sea
He looked back at the coils of line and they were feeding smoothly. Just then the fish jumped making a great bursting of the ocean and then a heavy fall. Then he jumped again and again and the boat was going fast although line was still racing out and the old man was raising the strain to breaking point and raising it to breaking point again and again.
Why there is a the in "at the coils" but not in "coils of line"(coils of the line), and there is a the in "of the ocean" but not in "to breaking point"(to the breaking point)?