[custom_adv] Shouting was forbidden on the Royal Yacht Britannia, and officers wore gym shoes to stay silent near areas where the Royal Family ate and slept, according to the yacht's official website. [custom_adv] Children were assigned an officer known as a "sea daddy" to look over them while onboard and keep them entertained with activities like treasure hunts and water fights. [custom_adv] There was a room aboard the ship called the "Jelly Room" that existed for the sole purpose of storing royal children's jellies, a gelatin dessert that Americans might call "Jell-O." [custom_adv] All of the clocks onboard the Royal Yacht Britannia are stopped at 3:01 pm, the last time the Queen stepped off the ship during its decommissioning ceremony in December 1997. [custom_adv] The ship had a full-time staff of more than 240 yachtsmen, known as "yotties," and cost an estimated $15 million to operate each year, Reuters reported. [custom_adv] The "yotties" had a daily ration of rum until the 1970s. [custom_adv] The former royal yachtsmen reunite annually to help maintain the ship. [custom_adv] Between Royal Family vacations and official tours, the yacht logged over one million miles, the equivalent of one trip around the world for each of its 44 years at sea. [custom_adv] The State Dining Room tables, which could seat 56 people, took three hours to set. The location of each utensil was measured meticulously with a ruler.