Charts & live data
Charts, depth and live boat data.
Underway is the at-the-helm view: worldwide NMEA 2000 position, depth, and live readings beside whatever regional chart packs are available for the operating area.
A simple underway view
Example only — not live boat data.
Complete system index
Everything in Underway.
Every tool carries its status. Available, not in current app, unproven, and roadmap never get mixed together.
Chart surfaces
NOAA Marine chart
Standard full-cover chart with channels, navigation aids, hazards, and depth contours in U.S. charted waters.
NOAA BlueTopo Relief
Bottom-depth color and hillshade reveal coastal structure while keeping routes and marks above the map.
USGS Satellite
U.S. shoreline and surface context while keeping the same center, zoom, bearing, and pitch.
Website trip planner
Builds an ordered route on NOAA Marine, USGS Satellite, and NOAA BlueTopo Relief views, with continuous zooming, press-and-hold placement, undo, editable marks, NOAA point context, browser drafts, and GPX export.
Worldwide formats
On salinity.live, your account stores your coordinate format and order, units, date and clock style, and time zone, and the website trip planner uses your coordinate and unit settings. The Android app uses fixed formats and does not read these settings.
Offline packs
Downloads a regional overview plus selected tight fishing areas and streams completed cells from disk.
Tap & hold tools
Probe charted depth or hold a coordinate to start a mark, tide, current, or depth action.
Boat underway
Boat position
Keeps the native position marker above the active chart surface.
Live NMEA data
Shows the boat’s connected speed, heading, depth, engine, fuel, and environmental channels.
Depth Watch
Combines live sounder change and tide context to warn about a shrinking depth margin.
Concurrent connectivity
Designed to receive boat data over Bluetooth, so the phone stays on Wi-Fi or cellular internet.
Signal K
A future read-only interoperability path for boats already organizing their marine data through Signal K.
NMEA OneNet
A future high-bandwidth marine-network input path that preserves Salinity’s listen-only product boundary.
Why it helps aboard
Download the operating area before leaving service. Once aboard, Salinity keeps that pack, boat position, and connected readings together without treating a phone chart as the final authority.
Signed field preview