COLREGS: Rules of the Road

Prepare with confidence for the USCG licensing exam, SWOS Advanced Shiphandling, or any navigation rules qualification with the most comprehensive COLREGS study app available. Whether you're a Naval Officer, Merchant Mariner, or recreational boater pursuing your captain's license, COLREGS: Rules of the Road gives you everything you need to master the International and Inland Navigation Rules all in one beautifully designed app. STUDY SMARTER, NOT HARDER The built-in Spaced Repetition system uses the proven Leitner box method to surface the questions you struggle with more often and retire the ones you've mastered. Instead of grinding through every question every session, you make measurable progress toward exam-day confidence in less time. Prefer a looser review session? Switch to Shuffle Mode for a randomized run through the full question bank — great for quick refreshers between watches. 1,272 EXAM-QUALITY QUESTIONS Questions are organized across three categories that mirror actual exam structure: - International Rules — open-ocean scenarios under COLREGS - Inland Rules — U.S. inland waters distinctions and applications - Both — rules that apply across all waters, tested together Filter by topic to focus your study where it counts: - Lights (Rules 20-31) — vessel identification, arc requirements, and display obligations - Shapes — day signals and their meanings - Whistles and Sounds (Rules 32-37) — maneuvering and warning signals - Diagrams — questions paired with one of 87 reference diagrams 87 INLINE REFERENCE DIAGRAMS Diagram questions display the relevant illustration directly within the question card — no switching apps or flipping through a paper handbook. FULL COLREGS PDF VIEWER Every question links directly to the relevant page of the official COLREGS publication. Tap the rule reference on any question card to jump straight to the authoritative text. SIMULATE REAL EXAM CONDITIONS Quiz Mode presents question sets with a 90% pass threshold — matching the rigor of actual qualification exams. Your quiz history is saved automatically so you can track scores over time and see your improvement at a glance. Drill down on your weakest areas with Missed Questions Mode, which isolates every question you've answered incorrectly for targeted review. BUILT FOR HOW YOU STUDY - Bookmark any question for a personal review list - Dark and Light theme — study comfortably in any lighting - No account required, no internet connection needed - One-time purchase — no subscriptions, no in-app purchases WHO IS THIS FOR? - Surface Warfare Officers preparing for SWOS Advanced Shiphandling - Merchant Mariners studying for USCG Deck Officer licensing - Officer Candidates and Midshipmen in navigation coursework - Maritime Academy students - Recreational boaters pursuing a captain's license - Anyone who wants to know the Rules of the Road cold One-time purchase. Study anywhere. Know the Rules.