In 2018, as the EUCISE2020 project was coming to an end, the Commission set the grounds to prepare for the full implementation of CISE and to support the transition into operations. The Commission proposed to involve EMSA for setting up and coordinating the actions envisaged for the transitional phase. The transitional phase was discussed with the Member States, several agencies and the EEAS during the 19^th, 20^th and 21^st meeting of The Member States Experts Sub-Group on the Integration of Maritime Security and Surveillance (MSeG).

During the 6^th CSG meeting DG MARE informed that the transitional phase has been extended to December 2023.

The governance structure of CISE for the transitional phase is defined in the document "CISE Transitional Phase: Governance Structure”.

The Activities of the transitional phase are defined in the document "CISE Transitional Phase: Activities".

The main objectives of the transitional phase, according to document "CISE Transitional Phase: Activities" are to:

• evaluate, and if appropriate streamline, maintain and consolidate the CISE network and interoperability building blocks resulting from the EUCISE2020 project;
• work towards information sharing and interoperability with existing EU maritime surveillance systems;
• define and configure additional data exchange services required in the current pre-operational CISE network; and
• on the basis of the above: define the baseline for CISE for post-2020 operations.