Marine navigation for Android

Nautical charts that travel offline.

Sea Chart brings downloadable marine charts, live GPS, weather layers, depth information, route tools and anchor watch together in one Android app—ready for the moments when mobile coverage disappears.

Download on Google Play Explore features

Android app · Maps & Navigation · Rated for ages 3+

Sea Chart nautical navigation map showing a planned route, seamarks, depth warning and GPS controls

Works offline

30+ regionsDownloadable chart coverage

Offline useCharts available at sea

Weather & GPSConditions, position and speed

Anchor WatchDrift monitoring alerts

Designed for life on the water

Essential marine tools, without the clutter.

From planning a coastal trip to keeping watch at anchor, Sea Chart gives sailors, boaters and anglers the information they need in a clear mobile workspace.

Offline nautical charts

Download chart data for supported countries and regions before you leave, then continue viewing maps without an internet connection.

Anchor Watch

Choose your anchor position and monitoring radius. Receive vibration and notification alerts when your vessel moves beyond the set range.

Real-time GPS tracking

See your current position and sailing speed directly on the chart, with speed shown in knots or kilometres per hour.

Seamark identification

Tap chart objects to identify buoys, lighthouses, anchorages, fairways, restricted areas, berths and other seamark types.

Distance measurement

Place multiple points on the map and calculate the distance between them to support simple route and voyage planning.

Saved places and facilities

Keep useful anchorages, berths and points of interest close at hand, and find nearby harbours, marinas, fuel and essential services.

Marine weather

Explore visual weather layers for wind, gusts, waves, precipitation, pressure and air temperature, with a time control for changing conditions.

Route navigation

Create a route to your destination and follow the planned course on the nautical chart with distance information and live vessel position.

Custom POI markers

Add your own markers and notes to the map so fishing spots, hazards and useful places remain easy to find on future trips.

Cloud sync

Inside the app

Built to make chart work feel simple.

These current Google Play screenshots show route guidance, weather layers, detailed depths and downloadable chart regions inside Sea Chart.

Sea Chart nautical route navigation with depth warning and marine chart controls — **Route navigation**Follow a planned course with live position, depth context and safety information.

Sea Chart marine weather map displaying animated wind conditions and forecast controls — **Marine weather**View wind, waves, gusts, precipitation, pressure and temperature layers.

Sea Chart bathymetry view showing water depths and depth contours around a harbour — **Depth detail**Read soundings, bathymetry and depth contours around the coast.

Sea Chart offline region selector showing downloadable basemap and bathymetry packages — **Offline downloads**Select regional basemaps and bathymetry packages before heading offshore.

Prepare before departure

Chart access beyond mobile coverage.

Internet access can be unreliable near remote coastlines and offshore. Sea Chart lets you prepare regional chart data on land so essential map information remains available on your device.

Choose your region

Find the chart package for the coast or country you plan to visit.

Download before you sail

Save the required data while you have a reliable connection.

Use charts offline

Open downloaded maps and navigation tools when internet access is unavailable.

Made for real trips

One chart companion, many ways to get afloat.

Sailing & cruising

Overnight anchoring

Coastal planning

Fishing trips

Coast exploration

Common questions

About Sea Chart

Can Sea Chart work without an internet connection?

Yes. Download chart data for your region before departure, then open and use the downloaded charts while offline. GPS availability depends on your Android device and location.

What can I see on a Sea Chart nautical map?

You can view marine chart data and identify seamarks such as buoys, lighthouses, anchorages, fairways, restricted areas and berths by tapping them on the map.

Does Sea Chart include an anchor alarm?

Sea Chart includes Anchor Watch. Set an anchor position and monitoring radius, and the app can alert you if the vessel moves beyond that range, including while the app is running in the background.

Can I measure a planned route?

Yes. Add multiple points on the chart to measure distances for simple voyage planning. You can also save frequently used places for later reference.

Where can I download Sea Chart?

Sea Chart is available for Android from Google Play. Use the download button below to open the official app listing.

Ready for your next voyage?

Take Sea Chart aboard.

Download the Android app, choose your chart region and prepare your device before leaving shore.

Get it on Google Play