Marinus ColRegs Lite is an Android app developed by Marinus Apps and is available for free. The app is designed to help users learn the International Regulations for Preventing Collisions at Sea (IRPCS/ColRegs). It is a must-have app for anyone who wants to navigate or pass their certificate. The app contains the most important parts of the IRPCS, including international code flags, Morse code, maneuvers, lights, Douglas sea scale, Beaufort scale, sound signals, and much more. All the information is presented in graphic sections for quick reference. The app is compatible with Android 9.0 and is perfect for anyone looking for an easy-to-use and simple nautical reference app.