See the seabed. Know what's under your hull.

INFOMAR is the most detailed seabed survey of Ireland ever made — twenty years of sonar data from the Geological Survey and Marine Institute. Depth. Ground type. Contour lines down to the metre. It's the best marine data available for these waters, and Maranox puts it on the mounted screen you use at sea.

Coastal bathymetry with depth contours

See what's beneath you

Colour-coded depth and contour lines around the full Irish coast. The kind of detail a yacht skipper uses to avoid a bar and an angler uses to find a drop-off — same data, both jobs.

Sediment classification — mud, sand, gravel, rock

Know your ground

Not just how deep — what the bottom is made of. Mud, sand, gravel, rock, or mixed. Matters whether you're shooting gear, anchoring for the night, planning a dive, or picking a wreck. And it's already on the chart for the whole Irish coast — no sounder, no surveying, not just where you've already been.

Sediment and depth blended together

Depth and ground type together

Slide between sediment colours and depth contours. See where sand meets rock, where the ground drops off, where the good tows are. All in one view.

Satellite view with bathymetry overlay

Works offline at sea

Download the charts once on Wi-Fi. At sea, everything loads from your phone — no internet, no buffering, no signal needed. Mount a tablet in the wheelhouse and you've got a chart plotter.

Shipwrecks & Diving

608 wrecks. Every one on the map.

Geological Survey Ireland catalogued every known wreck in Irish waters. Maranox puts them all on the chart — with the seabed data a dive skipper actually needs to plan the dive.

608 Wrecks mapped
GPS Every position pinned
Offline Bundled in the app

See the wreck on the seabed

Wreck position over INFOMAR bathymetry — see the depth, the contours around it, and the terrain the wreck sits on.

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Know your ground before you splash

Rock, sand, mud or mixed — the sediment layer shows what's around the wreck so you know what visibility and conditions to expect.

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Save your own dive sites

Drop marks on your favourite spots — reefs, walls, scenic dives, drift routes. Saved on your phone, always there.

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No signal? No problem.

All 608 wrecks are bundled in the app. Seabed charts download once. Works 50 miles offshore.

Maranox Tablet

Use Maranox on a tablet.

Join the iPad beta on TestFlight, or join the Android beta with the Google account on your tablet.

Maranox mobile bathymetry chart

Android tablet beta

Sign up with the Google account on your tablet. Your Play tester invite will arrive within 24 hours.

Maranox mobile sediment chart

iPad

Maranox iPad beta is open on TestFlight. Install it on iPad and use the same Irish seabed data offline at sea.

Join the iPad beta

By signing up you agree to be contacted about Maranox tablet access. Your email is deleted once you're added as a tester or whenever you ask. See our privacy policy.