The List and Trim Indicator Systems are used for indication of list and trim angles of the ship-especially for submarines. Symtronics Automation Pvt. Ltd. Manufactures List and Trim Indicator Systems. Symtronics Automation Pvt. Ltd. Is an ISO 9001-2000 certified company that offers electronic controls for Naval applications. The List and Trim Indicator Systems uses chip-based gravity accelerometers and microprocessor Controlled system for accurate and reliable indication of ship`s orientation in the control room. These Indicator Systems provides local and remote indicators and dual analogue and digital display of trim and list angles.