The 2020 VTS-ENAV Symposium, themed Enhanced Maritime Safety and Efficiency by Connectivity, will be held 25 to 29 May 2020 in Rotterdam, The Netherlands. The Symposium Steering Committee invites interested parties to submit abstracts of proposed presentations for the VTS-ENAV Symposium, on any of the topics listed below, or on any other topic considered to be in alignment with the theme of the Symposium.