This app describes the IALA (International Association of Marine Aids to Navigation and Lighthouse Authorities) recommended buoyage and light aids to maritime navigation using 3D views and a light rendering engine.It features the following : - IALA marks and lights inventory with real time 3D and light animations.- all the rythmic characters of lights with their animations.- the differents light types/applications as used on charts with 3D and light animations.- the port traffic signals.- a light renderer that enables you to render any light.- a charts section that illustrates/renders navigation at night.- exhaustive tests to improve your skills progressively .The app is free, with content restricted to premium users, ad free, and does not require an internet connection. It does not collect or share any user data.