About this app
Master COLREGS navigation lights at night with interactive 3D views and a focused quiz mode. Maritime Master – Nav Lights lets you explore realistic navigation light patterns in 3D and then test yourself on vessel type and aspect recognition. Rotate around the ship, see how the lights change with your bearing, and connect what you see to the COLREG rules that define each pattern. Explore COLREGS light patterns Browse a full set of navigation light configurations for power-driven vessels, vessels at anchor and aground, NUC, RAM, mine-clearance, dredgers, tugs and tows, fishing vessels, pilot vessels, air-cushion craft and WIG craft. View each pattern on a dark-hull 3D ship at night and drag to rotate around it to see the lights from dead ahead, bow, beam, quarter and astern. See a clear, plain-language COLREG rule overview for every pattern, linked to Rules 23, 24, 26, 27, 28, 29, 30 and 31. Check exactly which physical lights are fitted with a breakdown of masthead, sidelights, sternlight, towing light and all-round signal lights. Smart reference and search Group patterns by COLREG rule, by vessel size (over 50 m / under 50 m), or browse a simple A–Z list. Use the built-in search to find patterns by name, summary or rule number (for example “Rule 27”, “NUC”, “tug towing”, “fishing trawling”). Night Lights Quiz Practice recognising navigation lights in realistic 3D: each question shows a night view of the vessel from a specific aspect. Choose the correct combination of vessel type + aspect from multiple-choice answers. Use the binocular zoom button to temporarily zoom in on the lights. Get instant feedback: see your score update, and after each question review the correct answer (and your wrong answer when you miss it). Finish the quiz with a clean results screen showing total score and accuracy. Perfect for learners and refresher training Great revision for COLREGS / navigation lights questions in yachting and maritime exams. Helpful for skippers, students, cadets and watchkeepers who want to turn confusing night light patterns into something they recognise at a glance. This app is a study aid only and is not an official training course or exam.
Latest release
What’s New
Add day shapes Other bug fixes and improvements
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 19, 2026 · 10:36 AM $1.99
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