Hatches are openings or doors in a structure, often used for access or ventilation. They can be found in various settings, such as ships, aircraft, and buildings. Hatches can be designed to be watertight or airtight, depending on their purpose, and are typically secured with latches or locks. In maritime contexts, hatches are crucial for loading and unloading cargo. They allow crew members to access different compartments of a vessel, such as the hold or engine room. In aviation, aircraft hatches provide access to the cockpit or cargo areas, ensuring safety and functionality during flight operations.