Unlike land-based casinos in Las Vegas or Atlantic City, cruise ship casinos are not open 24/7 and must follow specific maritime and international laws. The primary rule is that the casino must remain closed while the ship is in port. This is to comply with local gambling regulations and to avoid competing with local businesses. Typically, the casino will open about 30 to 45 minutes after the ship reaches international waters (usually 3 to 12 nautical miles from shore) and will close in the early morning hours, often between 2:00 AM and 4:00 AM, depending on how many players are still active. There are rare exceptions, such as in Bermuda or Nassau, where local governments may allow casinos to open during overnight stays for a fee, but generally, if you are docked, the slots and tables will be dark. Sea days are the only times you will find the casino open during the daytime.