Below, within this context, denotes a position or location situated underneath or directly beneath the structural flooring of a boat, ship, or similar maritime vessel, commonly referred to as the deck. This may include spaces or compartments such as the hold, cabins, engine room, etc. that are found on the under surface or lower tier of the vessel. Its usage often refers to the relative vertical position or direction downward from the deck surface.

1. The sailors stored their equipment beneath the deck. 2. The captain hid the treasure map beneath the deck of his ship. 3. Children were playing hide and seek and one tried to hide beneath the deck. 4. During the storm, the passengers were advised to stay safe beneath the deck. 5. The lifeboat supplies were always kept beneath the deck in case of an emergency.

Did you know that in the golden age of pirate ships, beneath the deck was a whole hive of activity and particular design? This area is commonly known as the "hold". The front part of the hold, known as the forepeak, was typically the sleeping area for ordinary sailors. The larger central area was used for storing cargo, food, and the ship's water supply. The back part, or "lazarette", was often used for storing gunpowder and other weaponry. The spaces between the cargo were often so small that crew members would move around by crawling, leading to the term "limbering about".