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
View and navigate nautical charts for sailing, diving, and fishing. Plan routes and create waypoints. Share tracks with others. Subscribe for updated chart data. Access technical support via email.
Explore seafloor topography using NOAA's high-resolution bathymetry data. View underwater features like reefs, ledges, and channels. Access maps offline without a subscription.
Create passage plans by selecting waypoints from a database. Calculate true course and distance. Automatically determine magnetic variation and derive magnetic heading.
Set position using Smart Drop or map selection. Monitor status and receive alerts. Access community data for sailing conditions. Track boat location and receive notifications if movement is detected. Share location with trusted contacts.
