Marine Nav Lights Trainer vs RadarPlot

Master COLREGs navigation lights and day shapes with a professional spaced-repetition trainer designed for both real exams and real-world navigation. This app is a focused educational and revision tool for sailors, skippers, and maritime students who want an efficient way to learn, retain, and periodically refresh their understanding of the International Regulations for Preventing Collisions at Sea (COLREGs). It is designed for serious learners — including professional and advanced recreational mariners — who want a clear, distraction-free way to revisit complex rules, lights, shapes, and scenarios. Designed for long-term retention The app presents key COLREGs concepts in a structured, study-oriented format. By combining visual recognition with active recall and spaced repetition, it helps reinforce knowledge over time — making it suitable not only for exam preparation, but also for regular refresher use (for example every 6–12 months). Key features • Structured review of COLREGs navigation lights and shapes • Clear visual presentation of lights, shapes, and signals • Question-and-answer format to actively test understanding • Study, practice, and exam-style learning modes • Progress tracking stored locally on your device • Fully offline use after installation • No accounts, no ads, no tracking Built for focused study This app is intentionally simple and distraction-free. There are no advertisements, no subscriptions, and no internet dependency — just a reliable study tool you can use anywhere, anytime. Important notice This app is for training and revision purposes only. It does not provide real-time navigation assistance, operational decision-making, or situational awareness, and it does not replace official publications, onboard instruments, or professional judgment. You remain fully responsible for safe navigation and compliance with applicable regulations at all times.

Master radar plotting through practical, interactive exercises. RadarPlot is a professional training tool for maritime cadets, deck officers and navigators learning the 6-minute plotting method, relative motion, CPA calculations and collision-avoidance maneuvers. PRACTICE RADAR PLOTTING • Record target range and bearing observations • Plot multiple radar targets • Use a North-Up stabilized radar display • Adjust plotting intervals and range scales • Zoom and pan without affecting calculations CALCULATE CPA AND TARGET MOTION • Automatically construct the Relative Motion Line • Calculate CPA, TCPA and relative speed • Determine the target’s true course and speed • Visualize own-ship and target-motion vectors • Practice the standard 6-minute plotting method PLAN COLLISION-AVOIDANCE MANEUVERS • Set a required minimum passing distance • Calculate course-only and speed-only solutions • Select the maneuver execution point • Display the Advanced Relative Motion Line • Compare alternative maneuvering decisions BUILT FOR MARITIME TRAINING Use built-in scenarios and answer-reveal tools to learn step by step or practise independently. Ideal for maritime academy students, deck officers preparing for examinations, navigators refreshing manual plotting skills and instructors demonstrating relative-motion geometry. Train smarter. Understand the plot. Make safer decisions.