What is the best next step for a new Maranox user?

Install the Android phone app from Google Play. Email contact@maranox.ie for iPhone, desktop, wheelhouse or tablet availability.

Does Maranox work offline at sea?

Yes. Download Irish chart packs on Wi-Fi first, then seabed depth, ground type, wrecks, marks, tracks and routes load from the device at sea.

Is Maranox certified navigation software?

No. Maranox is a planning and situational-awareness tool. It is not suitable for navigation and does not replace certified navigation equipment, paper charts, VHF radio or safety gear.

Maranox Marine — Irish Seabed Charts for Mobile & Desktop

Irish seabed charts for phone, tablet and wheelhouse.

INFOMAR seabed depth, ground type, shipwrecks, GPS plotting, marks, tracks, routes and offline Irish chart packs on the screen you use at sea.

Start on Android today. Email us if you need desktop, wheelhouse, tablet or iPhone access.

Android is live on Google Play. Final trial and price terms are confirmed in the app store.

Maranox Marine is developed and published by Maranox Technologies Limited.

Offline chart packs for Irish waters INFOMAR depth, ground type and wrecks Planning tool, not certified navigation

Start with the phone app, or ask about a wheelhouse setup.

If you want Maranox on an Android phone, start with Google Play. If you are planning a tablet, desktop, commercial vessel or wheelhouse setup, email us and we will point you to the right version.

Maranox phone app is EUR29.99 per year or EUR6.99 per month with a 14-day trial where offered. Final price and trial terms are confirmed in the app store before purchase.

Built for Irish waters

Depth, ground type, wrecks and satellite context are built around the INFOMAR survey.

Works away from signal

Download the chart packs on Wi-Fi before leaving, then use them offline at sea.

Planning tool, not certified navigation

Use Maranox for seabed awareness and planning. It does not replace certified navigation equipment.

Which version should I choose?

Start with Android if you want a phone app today. Choose tablet or desktop if you need a bigger helm or wheelhouse screen.

Does it work offshore?

Yes, once the chart packs are downloaded. The seabed layers, marks, tracks and routes can load from the device without mobile signal.

Can I use it as my main navigation?

No. Maranox is for planning and situational awareness. Keep using certified navigation equipment, paper charts, VHF and safety gear.

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 screen you use at sea.

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.

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.

Works offline at sea

Download the charts once on Wi-Fi. At sea, everything loads from your device — no internet, no buffering, no signal needed. Use the phone app on deck or the desktop app in the wheelhouse.

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

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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.