Navitime · Study Library
The maritime Rules of the Road, made clear
A free reference for COLREGS, navigation lights, shapes and signals — in English and Arabic. For adaptive quizzes and flashcards, download the Navitime app.
10 topicsEnglish · ArabicFree
Group challenge
Quiz your class or crew — no app needed
Hosting a briefing or a lesson? Start a group challenge in the app and share a code. Anyone can join straight from their browser, answer the same questions, and see the live leaderboard.
Rules & Right of Way
The COLREGS rulebook and who gives way.Rules 1–41 & AnnexesThe full COLREGS rulebook, explained in plain language.
Core41 rules90 min
Sailing VesselsRule 12 — right-of-way between two vessels under sail.
Core3 scenarios8 min
Naval Formations (NATO Formations)The EXTAC 1000 formations — column, line abreast, line of bearing, diamond, circular — with Guide changes and FORM signals.
Advanced9 formations25 min
Lights, Shapes & Signals
Reading a vessel by day and by night.Navigation LightsWhich lights every vessel type must show, by day and by night.
Core20+ vessels30 min
Day ShapesBalls, cones, diamonds and cylinders shown by day.
Core10 shapes12 min
Sound SignalsShort and long blasts for manoeuvring, fog, and warnings.
Core15 signals15 min
Flags & SignalsAll 26 letters of the International Code of Signals.
Intermediate26 flags20 min
Morse Code ConverterThe full alphabet, numerals and the SOS distress signal.
CoreConverter10 min
Marks & Navigation
Buoyage systems and the working formulas.In the Navitime app
This is just a fraction of what the app offers
Download Navitime free on iOS and Android for the full Advanced Navigation book collection, adaptive quizzes, flashcards, and mock exams — all fully offline.