NAVY SECURITY AND TRACKING SYSTEM (MAST). The present invention relates to methods and apparatus which are described for security and naval asset tracking (MAST) purposes. One method includes transmitting identification data, location data, and environmental status sensor data from a radiofrequency indicator. One apparatus includes a radio frequency indicator that transmits identification data, location data, and ambient state sensor data. Another method includes the transmission of identification data and location data from a radiofrequency indicator using hybrid spread spectrum modulation. Another apparatus includes a radiofrequency indicator that transmits both identification data and location data using hybrid spread spectrum modulation.