Profile: Sperry Marine specializes in offering products for marine electronics industry. The ES 5100 navigation echo sounder provides accurate depth readings in shallow to deep waters with six operating ranges from 10 to 2000 meters being available. The marine echo sounder can be installed in a fixed or movable position and mounted on a wall or into a cabinet. We provide a full range of steering gear to accommodate many types of vessels and yachts. Navipilot 4000 ship steering control system is a marine autopilot which uses ship steering control network technology to control a ship. This autopilot is capable of tuning itself to adapt automatically to the ship's load characteristics.