What is the meaning of “aground” in a navigational context?

In a navigational context, the term "aground" refers to a vessel that is stuck on the bottom or ground. This situation often arises when the water level is too shallow for the vessel to float, causing it to make contact with the seabed, riverbed, or any other bottom substrates. When a vessel is aground, it may be unable to move until the water level rises or it is freed by other means, potentially leading to grounding incidents, which can cause damage to both the vessel and the marine environment.

The other definitions do not align with the standard nautical meaning of "aground." For example, a vessel that is anchored is securely held in place by an anchor and able to float, while a vessel that is elevated above water is not in contact with the ground. Furthermore, a vessel lost at sea refers to a scenario where it cannot be located or retrieved, which is entirely different from being aground. Thus, understanding the correct definition is crucial for safe navigation and response to emergencies at sea.