The Full Metal Cruise can be booked via the Mein Schiff website. (https://www.meinschiff.com/kreuzfahrt-buchen) Due to high demand, bookings are made via a waiting room that opens 30 minutes before bookings start. A Mein Schiff account (https://www.meinschiff.com/konto) is required for the booking, which must be created in advance.