Explanation: NMEA-0183 is a standard for serial data communication between marine electronic devices. While it uses voltages similar to RS-232, with typical operating signal levels often around +/- 5 volts or +/- 10 volts, the NMEA-0183 standard specifies a critical robust design requirement: receiver units must be capable of withstanding input signal voltages up to +/- 15 volts without damage. This damage tolerance ensures compatibility and resilience within marine environments, protecting equipment from potential overvoltages, miswiring, or variations in electrical systems. Therefore, NMEA-0183 devices are designed to safely handle signals across the full +/- 15 volt range, even if their nominal operational data signals are within a narrower band.