Identify and interpret navigation , shapes, and sounds used on water. Search for exact or possible matches using a "Draw-What-You-See" interface. Access a comprehensive database of maritime signals.
by Glenn Ludlow★ 4.52 ratingsNavigationFreeData updated 2026-09-08
COLREGs offers flag identification, weather scales, cloud recognition, sound signal guidance, and vessel light details. Users can access navigation , interpret flags, and understand sound and light signals for safe boating.
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Navigate using weekly updated nautical charts from NOAA. Plan routes manually or automatically. Record GPS tracks and store navigation data including markers and routes. Share data with others. Display tides and currents.
Study Navigation with over 1,200 practice questions covering Inland and International waters. Topics include Steering & Sailing , Lights & Shapes, and Sound Signals. Each question has detailed explanations.
Complete maritime navigation regulations reference.
The app provides the International Regulations for Preventing Collisions at Sea, 1972, and Inland Navigation Rules. It features an annotated table of contents, a search function, and a selected page for quick access to rules.
The app provides an intuitive maritime reference and learning companion for sailors. It features illustrated signals, a complete COLREGs reference, and interactive quizzes to test knowledge.
Track boat trips and navigate to destinations in North America. View real-time locations of friends. Access local knowledge from other boaters. Set and follow routes. Share trip details with others. Receive updates and alerts.
Learn boating and sailing techniques with detailed visual guides and safety protocols. Access interactive diagrams for navigation, knots, and equipment. Review procedures for emergencies, weather, and boat handling.
View high-resolution NOAA nautical with depth data for U.S. coasts, Great Lakes, major rivers, Brazil, and global areas. Navigate using GPS, track vessel position, and set waypoints. Access tidal information and route planning tools.
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Provides access to COLREGS and Inland , including amendments. It includes sound and light signals, steering and sailing , and other essential boating references. Users can search and bookmark regulations for quick reference.