Common Maritime Data Structure (CMDS) is commonly used by shore and ship users in e-Navigation data domain. In the overarching of e-Navigation architecture, IHO uses S-1XX, a digital exchange standard for next-generation marine information, as data exchange standard. The current CMDS has the advantage of intuitively recognizing the overall structure of e-Navigation. However, it has disadvantage in that it does not allow stakeholders to easily understand benefits that e-Navigation can provide when implementing e-Navigation. In this study, the direction of improving existing system for effective e-Navigation implementation was proposed considering RCOs (Risk Control Options) with expected composition of ship/ shore/ communication system by sector.

Abstract
 1. Introduction
 2. Current system improvement based onRCOs
 3. Expected system configuration bysector
  3.1 Ship system configuration
  3.2 Shore system configuration
  3.3 Communication system configuration
 4. Conclusion
 References

• Yun-Ja Yoo(Researcher of National Korea Maritime and Ocean University) Corresponding author