the entrance to the aquaduck is in the middle of deck 12, the main swimming deck aboard both ships. the entrance, pictured, leads one directly to a set of stairs leading to deck 16, the highest deck accessible by passengers aboard the ship. once one has reached the top of the stairs, they climb into a specially designed inflatable raft that seats two. if riding alone, the tourist will sit in the rear seat. if not, the heavier passenger will sit in the back with the lighter passenger directly in front of them. after boarding, a conveyor belt carries the raft to a translucent, acrylic tube. because of the clear nature of the tube, the rider(s) will catch glimpses of the ocean and the ship's deck below. after leaving the loading area on deck 16, the highest point accessible by travelers on the ship, the raft is launched 12 feet out over the edge of the deck and is suspended 150 feet over the water. the water coaster utilizes high-power water jets to defy gravity and propel the raft uphill at about 20 feet per second, an idea adopted from roller coasters. two sloped straightaways line the port and starboard sides of the ship. aquaduck boasts several tight turns and quick drops, much like most roller coasters. at the end of the coaster, the raft is pushed through 335 ft of rapids, down the lazy river and finally returned to the unloading area on deck 12.