This is a lite version of the full paid app. But you can still find a lot of new and interesting things in it. In this app you will be able to see what the epaulettes and insignia of merchant seafarers look like in different countries. You will learn about the job hierarchy on different types of ships, who reports to whom, and what the job responsibilities are for different crew members. Some ship types and seafarer positions will be blocked, but for your convenience you can easily go to the full app page, and purchase it, hopefully you will be interested.