To search for a Vessel, click the search icon (Magnifying Glass) at the end of the search box. A pop-up window will appear with a search box. Enter the partial vessel name or number into the field and select 'Search'. Click on the name of the Vessel in the results below the search box to select the vessel. Then click the 'Submit' button to find the vessel's last recorded position. Only vessels which have arrived or passed through a lock structure in the past 30 days will display in the search box.