In this paper, we implemented a safety navigation mobile application that converged AtoN information and location-based services. When application user uses the smartphone’s GPS sensor to transmit the user’s vessel location data to the data server, the user receives information of which its providing range is considered, such as stored AtoN data, neighboring vessels information, danger area, and weather information in the server. Providing information is sorted based on the smartphone’s direction and inclination and it will be also delivered via wireless network (5G, LTE, 3G, WiFi). Additionally the application is available to implement other functions such as information provision through voice and text alarming service when the user’s vessel is either approaching or entering the danger area, and an expanded information provision service that is available in shadow area linking with data-storing methods; other linkable data such as weather and other neighboring vessels will be applied based on the lasted-saved data perceived from the non-shadow area.

Abstract
1. Introduction
2. Mobile Application
    2.1 Location-based Mobile Application
    2.2 Navigation Safety Information Scenario
3. Application that combines marineenvironment information andlocation-based services
    3.1 Application
    3.2 System Modeling
4. Results
    4.1 Mobile Electronic Navigational Chart
    4.2 Aids to Navigation
    4.3 Weather forecast
    4.4 Safety Navigation
    4.5 Dangerous Area and AtoN Disorder Report
5. Conclusion
References

• Joong-Sung Jeon(Engineering Division 2, Anse Technologies Co. Ltd)