The coast, charted.
1,160 maritime places.

The Mediterranean, Aegean, Marmara, and Black Sea coasts are charted in the greatest depth — most of the 1,160 charted places sit there. Any other coastline on Earth fills in dynamically on demand from OpenStreetMap vector geometry as you explore.

Atlas draws six switchable place layers: ports and marinas, anchorages and beaches, historic sites, lights and beacons, dive sites, and marine services — plus a GEBCO depth-contour overlay. Each one can be switched on and off independently to keep your chart uncluttered.

No. MARLOG Atlas is an expedition, discovery, and coastal reference instrument, not an official Electronic Chart Display and Information System (ECDIS). Mariners must always carry official hydrographic charts for legal navigation decisions.

When you navigate within 200 metres of a charted place (anchorage, ruin, lighthouse), the app uses hardware GPS to verify your physical presence. Logging the visit records it to your mariner logbook and unlocks authentic expedition badges with no remote check-ins.

The basemap already covers every coast on Earth, so it renders in MARLOG’s high-contrast dark theme immediately. When you pan into a stretch MARLOG has not indexed yet, it asks OpenStreetMap for that cell in the background and the new pins land as they arrive.

Atlas requires an active connection to download new map regions and live place data. Your last charted position is remembered on the device, so the chart opens where you left it.

Yes. The integrated Route Ruler tool allows you to lay points across open water to calculate total distance in nautical miles (NM), true bearings, and estimated passage time at a six-knot cruising speed.