The Sperry Navitwin IV Display CDU 4994 AC is a display unit used to show data from Sperry Marine’s navigation systems, including radar, gyrocompasses, and speed logs. This display provides operators with real-time information about the vessel’s position, heading, and other critical navigational parameters. The CDU (Control Display Unit) is designed for easy integration with Sperry’s various systems, offering a user-friendly interface and high-resolution display. Its robust design ensures reliable performance in harsh marine environments, making it an essential tool for modern maritime navigation.