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Why are electronic navigation aids also useful on ships?

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Electronic navigation aids are essential for modern maritime operations because they provide continuous, accurate positional data and enhance safety in challenging conditions.

Computers process streams of data from instruments like the gyrocompass and logs to maintain dead reckoning, while integrating inputs from radio systems such as loran or the global positioning system (GPS) to provide real-time updates.1

Beyond positioning, electronic aids are critical for collision avoidance. Radar allows navigators to detect other vessels regardless of light conditions, enabling ships to continue moving safely through thick fog rather than being forced to anchor. Furthermore, specialized systems like sonar are utilized for underwater detection, such as identifying submarines or shoals of fish. By utilizing digital computers to perform complex calculations instantaneously, these systems ensure that ships can maintain precise headings and speeds, significantly improving overall navigational efficiency and safety.231