They were also to be the most luxurious ships ever designed. Below the waterline was the orlop decks for cargo, and the tank top where the engines, boilers, turbines, and electrical generators were. At the very top was the boat deck, where the bridge and wheelhouse were, as well as the lifeboats. Accommodations for first class included a gymnasium, four dining location options (Dining saloon, Cafe Parisian, A La Carte Resturant, and the Veranda Cafe), a reading room, swimming pool, squash court, and a Turkish bath. Second class had a library, which was used by first and second class. All of the classes had lounges, promenades, and smoking rooms. In between were the decks for the passengers with first, second, and third class cabins. "Titanic" would act like a floating hotel, featuring the Grand Staircase which allowed first-class passengers to move from deck to deck, and had a dome skylight to allow natural light in. "Titanic" carried 20 out of possible 64 lifeboats. "Titanic" had 4 funnels, but only 3 were attached to boilers. Many claimed the "Titanic" was unsinkable because the hull was divided into 16 watertight compartments. 