A living watchlist of the vessels you care about, scrubbable AIS history for any port call, and evidence-grade positions for post-incident review. Built for dispatch, not for dashboards that decorate.
Pin the MMSIs that matter to your operation — owned hulls, chartered tonnage, competitor traffic, a counterparty's fleet. ChartNav pings every frame they broadcast, anywhere on the planet.
Underway, at anchor, moored, or dark? The list tells you instantly. No dashboards with twelve tabs. One column, one chart, one truth.
Pick a vessel, pick a window, hit play. Every broadcast position in that window animates back across the chart at the speed you choose — 1×, 8×, 64×, whatever your review cadence is.
Claims investigators, charterers, and operations leads all want the same thing: to see what actually happened, with timestamps. No guessing. No reconstructing from tugboat WhatsApp threads.
Each position ChartNav renders comes from an AIS VHF broadcast decoded against ITU-R M.1371. Timestamps are preserved. Sources are named. The chain of evidence is clean enough for dispute, insurance, or regulator.
We don't fabricate positions, interpolate across gaps, or apply undocumented smoothing. What you see is what was broadcast, when it was broadcast.
One sortable column — SOG, COG, status, last heard. Not a dashboard. A roll call.
Click any vessel, see every historical position we've received, rendered as a track.
A vessel stopped transmitting? Your watch-list flags it. Configurable dwell threshold.
Organize by group — owned, chartered, counterparty, competitive. Fast switching.
Arrival, berth, departure — time-stamped against transmitted positions for every call.
Dump any vessel's history for a window as CSV — bring it into your own stack.
Satellite + terrestrial AIS. Coastal density near every major port, ocean coverage in-between.
Overlay NEXRAD, fronts, gales, and heavy seas on your fleet map in one click.
What shipping and fleet teams ask before they point their teams at it.
Unlimited MMSI watchlists, historical AIS replay, CSV export, and audit-grade position data — free, no subscription. MarineTraffic and VesselFinder both paywall historical data, cap free fleet size, and charge for exports. ChartNav doesn't.
Yes. Positions are retained with UTC timestamps as broadcast under ITU-R M.1371, with no interpolation or smoothing. The position ledger shows source, timestamps, and any frame gaps — review-ready.
Unlimited. Organize into multiple named fleets — owned, chartered, counterparty, competitive — and switch with one click.
Yes. Per-vessel, per-window CSV of every frame. Bring it into your warehouse, your BI tool, your investigation workflow.
Coastal terrestrial plus satellite AIS. High density near major ports, continuous ocean coverage from satellites. Median latency under two minutes.
Yes. Configurable dwell threshold per watchlist. AIS-dark events surface to the top of the roll call.
Open the app, paste in your MMSIs. See them inside a minute. No signup required.
Open the console