Showing 1–20 of 1,000 ranked alternatives.
Alejandro Martinez de Carvajal
Search navigation instantly anywhere
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.
Richard Craddock
Calculate course and speed with current data
Calculate Course to Steer and Speed over Ground using heading, boat speed, current set, and drift. Input Magnetic Variation for True and Magnetic compass readings. Visualize heading, current vector, and course on a 360º compass.
Calculated Industries, Inc.
Browse boating charts and images
Access boating information with detailed charts, graphs, and illustrations. Look up formulas, safety guidelines, and equipment specifications. Search for content by topic or use the table of contents. View 800+ images and diagrams for visual .
David Boren
Learn for fishing, climbing, boating, and scouting
Learn and practice over 220 used in fishing, climbing, boating, and scouting. Browse by category or search by name, synonym, or ABoK number. Save favorite for quick access and review.
DOUBLE U s.r.o.
Track speed, distance, and trip stats
Monitor trip data with live metrics like average speed, current speed, top speed, distance, direction, travel time, stationary time, and clock. Customize display style and speed units. Arrange metrics on screen.
Grog LLC
Learn , view diagrams, save favorites
Learn to tie with step-by-step tutorials covering 195+ . Organize by activity category and type. View detailed instructions using rope, paracord, or other materials. Save and reference knot diagrams for climbers, boaters, and other users.
Nitin Katrodiya
, study math, and practice techniques
To tie practical used in boating, camping, climbing, and sailing. View detailed instructions and diagrams. Explore classifications like hitches, bends, and splices. Study theory and its mathematical applications.
NavX Studios LLC
Navigate with real-time charts and weather data
Access charts, maps, weather data, and AIS information. Navigate with worldwide chart coverage from multiple providers. View real-time weather and track vessel position. Set waypoints and measure distances between points.
GEC s.r.l.
Download charts, navigate offline, connect instruments
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.
Bist LLC
Navigate with and river
Access for the USA, Canada, UK/Ireland, Germany, Netherlands, and European rivers. View NOAA vector , freshwater lake maps, and USACE inland river maps with bathymetry data. Create or import GPX/KML routes. Use voice prompts for route navigation.
Nautica SIA
Learn chartwork and safety rules
Learn fundamentals with interactive lessons on chartwork, safety, buoyage, light signals, shapes, sound signals, meteorology, GMDSS, and anchoring. Take quizzes to test knowledge and track progress.
Eldar Sadykhov
Tie , learn strengths, choose right ones
Provides detailed instructions on tying various . Users can select for binding lines, attaching hooks, and securing lures. Information includes knot strength, suitability for different line types, and compatibility with multifilament lines.
Andrea Bisegna
Track position and mark waypoints
Track position and course over ground. Mark and edit waypoints. Measure distance in nautical miles and meters. Calculate course to waypoint. Display speed in knots, mph, or km/h.
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.