Dolphin or piling anchors, drop a few in a row. Each has it own piling, attached to each other with logs on top! For containing floating merchandise. Hooks are for attaching to other anchors, without piling. Tide and current dictated the needs. Log rafts going from the northwest to ports south, used something similar! Of course this is just my guess!🤔
Makes as much sense as my thoughts of them going around a piling to bring a floating deck down with the tide.
