Royal Yacht Becalmed at Anchor Peter Monamy (1681-1749)

The picture has something of this: watercraft, sailboat, ship, transportation system, boat, sail, water, vehicle, sea, ocean, schooner, yacht, ocean cruise, harbor, nautical, regatta, sky, navy, sailing.
Perhaps it’s a painting of a boat in a body of water with other boats in the water and onlookers on the other side of the water.