Which two main types of E-NAV systems are commonly used?

Global Navigation Satellite Systems (GNSS) and Electronic Chart Display and Information Systems (ECDIS) are essential components in modern electronic navigation.

GNSS is critical for determining a vessel's precise position anywhere in the world using signals from satellites. This system provides mariners with accurate location data, which is vital for navigation, especially in open waters where traditional navigation aids may be unavailable. The integration of GNSS into navigation practice has transformed maritime operations, offering real-time positioning with high accuracy.

ECDIS, on the other hand, serves as an advanced navigation display system that utilizes electronic navigational charts. It allows mariners to visualize their navigation environment, making it easier to route planning and monitoring. ECDIS systems integrate various layers of information such as navigation aids, land topography, and maritime regulations. The ability to display real-time data, alarms for no-go zones, and weather conditions enhances a navigator's situational awareness, thereby improving safety and efficiency at sea.

Together, GNSS and ECDIS represent the backbone of electronic navigation, combining precise positioning with comprehensive charting capabilities to support safe and effective maritime operations.