ChartNav
For fleet operators & dispatch

Every hull. Every hour. One chart.

A living watchlist of the vessels you care about, scrubbable AIS history for any port call, and positions preserved as broadcast for post-incident review. Built for dispatch, not for dashboards that decorate. The map behind this text is live.

vessels live now
30 daysAIS replay
MMSI watchlist
1,480port pages
The watch

A roll call, not a dashboard

Star any vessel into your fleet, group by owned, chartered, or counterparty, and read the whole picture in one sortable register — position, speed, destination, last heard.

The roll call, live

This table is real — the fastest hulls underway on the network right now, straight from the live feed. Your own fleet reads exactly like this: name, SOG, destination, last heard.

mustering…
LIVE · every row links to the vessel's page

The port-call audit trail

Arrival, time alongside, departure — timestamped against transmitted positions and kept permanently. Below: the Boston pilot boat's actual working day, from the record.

pulling the record…
LIVE DATA · port_events record · per vessel and per harbor

AIS replay — recorded traffic, playing back

Pick a vessel, pick a window, hit play. Every broadcast position animates back across the chart at your review cadence. When the charterer asks what actually happened at the anchorage, scrub to it. Below: six real hours, animated.

loading replay window…
LIVE DATA · position archive · every vessel, not just the ones you follow
Live now

The vessel register streams "just arrived" straight from the port-events record and ranks the fastest hulls underway — then filters 250k+ vessels by silhouette, flag, or fleet.

Browse the live register →
Defend the ETA

Weather over the schedule

Four primary wind models compared at the pilot station, real radar on the chart, and the GOES view of the whole ocean leg. When the models disagree, you see that too.

Four-model wind

GFS, HRRR, NBM, and ECMWF ingested from the source and compared at your waypoint — live meteogram below.

loading model point…
LIVE · direct model ingest

NEXRAD radar

Real WSR-88D scans on the chart — the last eight sweeps of the Boston radar, looping now.

loading radar loop…
LIVE · Level-2 + NIDS in the app

GOES satellite

GeoColor, true color, and night IR from GOES-19, refreshed every five minutes. This is the latest frame.

loading GOES…
LIVE · fog detection layer in the app
And the rest of the operations kit

Port call history

Arrivals and departures per vessel and per harbor, kept permanently in the port-events record.

CPA & proximity alerts

Closest-point-of-approach projection and configurable proximity alerts around your position.

Track reconstruction

Every recorded position for any vessel, rendered as a track. Timestamps as broadcast, no smoothing.

Marine warnings

Gale, storm, SCA drawn on their real NWS zones — over the water your hulls are on.

Vessel pages

A page for every hull — photo, particulars, live track, timeline, and port calls.

Routes & GPX

Plan the leg, check it against depths, export GPX 1.1 to the bridge plotter.

One backend, four helms

Web in any browser · iPhone & iPad native app · Apple TV boat-dashboard mode · Apple Watch on your wrist. Fleets, marks, routes, and alarms stay in sync.

PWA today · native apps in TestFlight
CAUTION ChartNav is a planning and situational-awareness tool, not a navigation system. AIS shows only vessels that broadcast. Forecasts are model output and can be wrong. Carry official charts and publications, and keep a proper watch.

Questions from operations desks

How is ChartNav different from MarineTraffic and VesselFinder?

Unlimited MMSI watchlists, historical AIS replay with timeline scrubbing, and full track reconstruction — in the browser, built for operations teams rather than casual tracking.

Is the AIS data evidence-grade for insurance or disputes?

Positions are retained with UTC timestamps as broadcast under ITU-R M.1371, with no interpolation or smoothing — review-ready.

How many MMSIs can I track on one watchlist?

Unlimited. Organize into multiple named fleets — owned, chartered, counterparty, competitive — and switch with one click.

What is the global AIS coverage?

Worldwide terrestrial AIS receiver networks. High density near major ports and shipping lanes; open-ocean coverage depends on receiver range. Median latency under two minutes.

Put the fleet on the chart.

Every demo on this page ran live. The register is one click away.

Open the vessel register