Definition: In the context of maritime navigation, a "debar" refers to a specific type of deck on a ship. Debars are often used in ships that require high visibility and therefore have a deck with a low or even no window for natural light. The purpose of having such decks is to provide an effective means of seeing the surroundings while at sea, especially when visibility is poor due to fog, darkness, or other conditions. Debar decks can be either open or enclosed, depending on how they