There are some links in social media, promising a free trial for vesseltracker.com. The linked website is being used for phishing and attempting to collect login data from vesseltracker users.
In order to keep you safe:
Please make sure that you only enter your login data on the real websites www.vesseltracker.com or cockpit.vesseltracker.com
Make sure your browser shows a green lock in the address bar, indicating that it is a secure connection
Should you have entered login data somewhere else already, please change your password on the real website. To do this, please log in at www.vesseltracker.com, click on your username and then on "My vesseltracker". There you will find the option to change the password