One chart.
Many waters.
ChartNav is the same live, high-fidelity maritime workspace — a free browser-based nautical chart with AIS, NOAA ENCs, NEXRAD radar, tides, currents, and buoys — tuned to who you actually are on the water. Pick the water you run.
Plan the bight, not the gamble.
Tide-aware routing, anchor alarms that don't sleep, and a chart that rotates with your compass. Built for the passage you're actually going to make on Saturday morning.
- Route planning + GPX
- Anchor alarm with drift
- Tide & current gauges
- MOB one-tap
Every hull. Every hour.
A living watchlist of the vessels you care about, a scrubbable AIS history for any port call, and a tactical overview that doesn't need a data team to interpret.
- MMSI watchlist
- Historical AIS replay
- Multi-fleet dashboards
- Audit-grade positions
The whole sky, on board.
NEXRAD Level-2 radar, satellite cloud, lightning, wind barbs, currents, and fog — in one unified chart. Read the weather before it reads you.
- NEXRAD L2 + NIDS
- Wind barbs + fog
- Current vectors
- Passage planning
The bite, the weather, the window.
Tide windows at your favorite grounds, NEXRAD radar for pop-up thunderstorms, NDBC wind and wave, plus AIS awareness of draggers and party boats — free, no subscription.
- Tide windows per spot
- NEXRAD L2 radar
- Charter fleet watchlist
- GPX waypoint export
Slack water. Anchor set.
NOAA slack-tide windows per site, live current vectors, anchor alarm while divers are down, and NDBC wind/wave for surface calls. Free for commercial dive charters.
- Slack-tide windows
- Current direction
- Anchor drift alarm
- Dive-site library
Every ship has a story.
Live AIS with Wikimedia vessel photos, flag and class identification, arrival times, and an unlimited MMSI watchlist. A free alternative to MarineTraffic and VesselFinder.
- Global live AIS
- Vessel photos + flags
- Port arrivals
- Unlimited watchlist
Launch with the current. Come back on it.
Wind forecast barbs, NOAA tide windows, live currents, NEXRAD radar, and NWS fog advisories — tuned for small craft where the margin is narrow.
- Wind forecast
- Tide & current timing
- Storm radar
- Launch waypoints