In the dynamic and uncertain contemporary business environment, sensemaking in organizations is critical to their success and survival. While Internet-based systems are believed to play a key role in providing external information for this process, there is scare knowledge concerning how it can be achieved. This paper provides a theoretical model that examines why and how the application of social navigation systems (SNS) facilitates sensemaking in organizations. It is hypothesized that SNS contributes to sensemaking by facilitating each of its sub processes: it enhances information quality, facilitates the interpretation of the information, and contributes to information and meaning sharing among managers. This paper contributes to existing literature by expanding our understanding of sensemaking process in organizations and how information technology can support it.