What does it mean when a boat is described as being aground?

When a boat is described as being aground, it means that it is touching or stuck on the bottom. This situation typically occurs when the water level is too low for the boat to float freely, often leading to the boat's hull resting on the riverbed, lake floor, or ocean bottom. Being aground can create challenges for navigation and may necessitate assistance or a change in water conditions to free the boat.

The other options refer to different states of a boat's position. For instance, floating on the surface indicates the boat is buoyant and not in contact with the bottom, while being docked securely at a marina denotes that the boat is tied up and stable at a designated location. Being completely submerged underwater implies that the boat is entirely below the water's surface, which is not the same as being aground. Understanding these distinctions is crucial for boat operation and safety.