Seaworthy means that a boat is very safe to use in the ocean. This is because the boat has been carefully made and checked to ensure that it will not sink or break apart when it's in the water. People who make boats have to follow strict rules and guidelines to make sure the boat is seaworthy. They check things like the hull (the body of the boat), the engine, the steering, and the safety gear to make sure everything will work properly in the ocean. When a boat is seaworthy, it means that you can trust it to take you on a safe and enjoyable journey in the ocean.