Mariners Visual Quiz is an educational app designed for seafarers of all ranks and nationalities. It offers helpful visuals that seafarers should know to enhance their knowledge and skills. The app contains five categories: IALA Maritime Buoyage System, Colregs (Lights and Shapes), LSA FFE, ICS Maritime Flags, and Shipboard Stuff. Each category has multiple items, totaling to 220 items.

One of the app's best features is that it does not require an internet connection, making it accessible even in remote areas. The app's interface is simple and user-friendly, making navigation easy for users. The app is compatible with Android 4.1 and up.

It's worth noting that the app's developer, Azimuth, has included a disclaimer that all trademarks and public domain images used in the app are the property of their respective owners and do not infringe any patent, trademark, or copyright. The app is for educational purposes only, and the developer assumes no responsibility or liability for any errors or omissions in the content of the app.

Overall, Mariners Visual Quiz is a useful app for seafarers who want to improve their knowledge and skills.