 The pilot signals the departure and arrival of "Mark Twain" using a horn and bell system, along with various signals to other river craft attractions.Because the riverboat travels along a hidden I-beam guide rail throughout the ride, the pilot does not maneuver the ship.Instead, the pilot serves as lookout for other river traffic, such as Davy Crockett's Explorer Canoes and the Rafts to Pirate's Lair on Tom Sawyer Island, and communicates his observations with the boiler engineer.