Free & open source · Australian waters

See the
seafloor.
In 3D.

Open any bathymetry you have, any GeoTIFF or MBTiles at any resolution, and fly over it in 3D. Plus offline maps, tides and charts for your plotter. No account, no subscription.

Get the apps View on GitHub
3D seabed of reefs on the Great Barrier Reef, coloured by depth
17°51.3′S 146°38.1′E Central Great Barrier Reef, QLD

Seabed: IMAS bathymetry composite (CC BY 4.0), resampled. Live 3D, drag to turn.

Any fileGeoTIFF & MBTiles, any resolution
100×vertical exaggeration
Offlinemaps, tides & conditions
$0no account, ads or tracking

Four apps · one toolkit

Everything from survey
to sounder.

SeaBathy for Android showing reefs coloured by depth

Android

SeaBathy

The seabed in your pocket. Open any GeoTIFF or MBTiles in 2D and 3D, with offline maps, tides, sea conditions, routes and an anchor alarm.

Download APK Source
SeaBathy Desktop 3D view of reefs

Windows

SeaBathy Desktop

Plan on the big screen. The same maps and 3D for your own GeoTIFF and MBTiles files, sharp to every pixel of the data.

Download for Windows Source
A depth GeoTIFF made with BathyPicker, open in SeaBathy Desktop

Windows · macOS · Linux · Android

BathyPicker

No data of your own? Draw a box anywhere in Australian waters and get a free depth GeoTIFF from the IMAS survey composite, up to 10 m detail.

Download Source
AT5 Chart Maker window

Windows · for Simrad, Lowrance & B&G

AT5 Chart Maker

Put your own depth charts and imagery on your chartplotter's SD card.

Download Source

Features

Built for reading
the bottom.

3D view of reefs coloured by depth at 10 times vertical exaggeration

3D seabed

Every ledge, wall and bommie.

Fly over any depth file in 3D, stretch the relief up to 100×, add contours and drape maps over it.

Depth colours: palette and depth range settings

Depth colours

Colour it your way.

Palettes, relief shading and a depth range you set, so the structure you care about stands out.

Tide chart with highs and lows on a phone
Ocean currents and wind on a phone

Tides · conditions · offline

No signal? No problem.

Save maps, tides, wind, swell, currents and sea temperature before you leave the ramp.

Planning a route with depths along each leg

Plan

Plan the run.

Waypoints and routes with the survey depth checked along every leg. GPX in and out.

Bathymetry imagery made into a chartplotter chart

Chartplotter

From survey to sounder.

Turn depth contours or coloured bathymetry into charts for Simrad, Lowrance and B&G units.

How it works

Load. Explore. Go.

  1. 1

    Bring your data

    Any GeoTIFF or MBTiles you have, or draw a box in BathyPicker for free survey data.

  2. 2

    Explore it

    Open it in SeaBathy on your phone or PC. Fly over it in 3D and drop marks.

  3. 3

    Take it out

    Everything works offline on the phone, or goes onto your plotter with AT5 Chart Maker.

Your data · open data

Your files, plus the
best public data.

Not for navigation. SeaBathy is for research, planning and interest. It is not an official nautical chart. Always carry official charts and use proper navigation equipment.

Get a better look at the bottom.

Free for everyone. Open source under the MIT licence.

Get the apps View on GitHub