: v3.1 was among the versions that began refining the integration of Sonarcharts , which used community-sourced sonar logs to provide high-definition 0.5m bathymetry (bottom contours).
"We see about five of these cards a month for repairs. Usually, the magnetic stripe fails or the card corrupts. If you have a v3.1 card, back it up immediately (though the backup is illegal for resale, you can protect your investment)." Marine Europe HD v3.1 -Navionics-
| Feature | Marine Europe HD v3.1 on iPad | Entry-Level Chartplotter | | :--- | :--- | :--- | | | 9.7" tablet display | 3" to 5" screen | | Price (with iPad) | ~€850 (iPad + App) | ~€500 (device + one region) | | Total Coverage | Entire Europe | One region | | Chart Quality | Vector (Gold-level) | Basic Vector | | Cost of Chart Updates | Free | €150-€250/year | If you have a v3
Marine Europe HD v3.1 is a legacy version of the Navionics mobile application specifically designed for high-definition (HD) tablet displays. While this specific version was once a standalone purchase, Navionics (now a For safe navigation, it is highly recommended to
The version stabilized rendering for depth lines down to 0.5-meter (1-foot) contours across major European waterways, laying the early groundwork for the current SonarChart™ bathymetry system.
: Legacy versions like v3.1 no longer receive the daily chart updates or Notice to Mariners (NTM) corrections. For safe navigation, it is highly recommended to use the latest version available on the Apple App Store or Google Play Store.