At approximately 57 minutes into the movie, when a sailing vessel is seen approaching the coast, the square rigged sail is completely aback as it's clearly being propelled by unseen equipment, either going against the wind, or with sail taken aback by the apparent wind.
When searching for Telemachus, the suitors use greyhounds to track him by his scent. Greyhounds are sight hounds and can only hunt or track visually, not by scent.