rowlock

hankain puhekieltä a pivot attached to the gunwale (outrigger in a sport boat) of a boat that supports and guides an oar, and provides a fulcrum for rowing; an oarlock (qualifier).
1884, (w), (w), Chapter VII

I took a good gap and a stretch, and was just going to unhitch and start when I heard a sound away over the water. I listened. Pretty soon I made it out. It was that dull kind of a regular sound that comes from oars working in rowlocks when it's a still night.

Everything smelled salt and there was no noise except the swishing of water and the clop-clop of water against the sides and the splash of the oars and the jolting noise of the rowlocks.