Free & open source · Australian waters

See the
seafloor.
In 3D.

Survey-grade bathymetry down to 10 m detail, a 3D seabed you can fly over, offline maps 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 10 m bathymetry composite, CC BY 4.0. Live 3D, drag to turn.

10 msurvey detail
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. Surveys in 2D and 3D, 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, surveys and 3D, sharp to every pixel of the data.

Download for Windows Source
BathyPicker: drag a box over Australian waters

Windows · macOS · Linux

BathyPicker

Draw a box anywhere in Australian waters and get one depth GeoTIFF, 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 close-up of a reef wall at 30 times vertical exaggeration

3D seabed

Every ledge, wall and bommie.

Fly over the survey in 3D, stretch the relief up to 100× and drape satellite imagery 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.

3D view of the Whitsundays with satellite imagery on a phone
Ocean currents and wind on a phone

Offline · conditions

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

Pick. Explore. Go.

  1. 1

    Pick your patch

    Draw a box in BathyPicker and download the survey for it.

  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.

Open data

Built on 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