The fastest way to look up for a vessel is to search using the Vessel Finder. Click on the compass symbol located on the top right side of the page (Add/Update Position)
...
...
The following window will open up. Here is where you can type in the vessel’s name or IMO Nr to find it and select it.
You can look up for the vessel’s details and as well as calculate the distance from one port to another.
The below screenshot shows the options available.
...