Frequently Asked Questions
General Information
What is Marine Navigation?
Marine Navigation is an offline GPS chartplotter built for sailors, anglers, and
coastal navigators who want freedom and control at sea. You can use it offline, keep your data
private on your device, and choose the plan that fits you: Premium (Subscription or Lifetime) or PRO
(optional subscription for advanced tools). Trusted by navigators worldwide since 2009.
Why should I choose Marine Navigation?
Because it’s designed around real offshore needs: reliable offline navigation,
privacy-first by design, and unmatched flexibility with custom maps. You’re not forced into
“renting” access—Premium offers a Lifetime option, and PRO is optional if you want
professional-grade features.
Which devices are compatible?
Marine Navigation works on iOS and Android smartphones and tablets.
Is Marine Navigation available in different languages?
Yes. The app is available in English, Italian, French, German, Spanish,
Indonesian, and Turkish.
Can I use the app offline?
Yes. You can download and save maps directly to your device. Once saved, they
are available offline, allowing you to navigate even without an internet connection.
Do you track my location or sell my data?
No. We value your privacy. Your location data, routes, and waypoints are stored
locally on your device. We do not track your movements or sell your data to third parties.
Maps & Charts
What maps are included?
Premium and PRO give access to a wide selection of chart sources and layers,
such as NOAA raster charts (U.S.), OpenSeaMap, ESRI satellite imagery, bathymetric maps, and other
available layers inside the app. PRO also unlocks S57/ENC chart support via the proprietary PRO
engine (PRO-only).
How often are maps updated?
Updates depend on the original providers (NOAA, ESRI, OpenSeaMap, etc.) and are
published as they release them. You can refresh or re-download areas to get the latest available
data. With PRO, you can also use official S57/ENC charts from authorized sources (where applicable).
Does Marine Navigation work worldwide?
Yes. The app works anywhere your device has GPS. Map detail depends on the layer
and coverage in that area, and you can always supplement with your own Custom Maps (Premium/PRO) or
S57/ENC charts in PRO (where available/authorized).
How do I import my own maps?
Marine Navigation supports importing georeferenced charts:
- Premium: Import standard custom maps (up to 3000px, 2 maps limit).
- PRO: Import unlimited high-resolution custom maps with advanced overlays.
- Note: Official S-57/ENC chart support is available exclusively in the
PRO version.
How do I upload ENC charts?
How do I delete maps?
Simply long-press on the name of the map you want to delete and confirm.
Subscriptions & Accounts
Can I try Marine Navigation before buying?
Yes. Start with the Lite version to test basic features. You can then choose
between a Premium upgrade (Subscription or Lifetime) or the advanced
PRO subscription for professional tools.
What is PRO and why should I upgrade?
PRO is our professional subscription that unlocks the most powerful features:
- S-57/ENC PRO Engine: Official vector chart support.
- Worldwide Offline Tides: Powered by FES2022b data.
- Unlimited Custom Maps: No size limits, transparency control, and overlays.
How do subscriptions work?
- Premium: Available as a flexible Subscription or a one-time
Lifetime purchase.
- PRO: Available as a Subscription only (monthly or yearly).
- Your Data: If you cancel PRO, you keep your Lifetime purchase status and
all your data (waypoints/routes), but PRO features will lock.
Can I use the app on multiple devices?
Yes. You can use your purchase on multiple devices as long as they are signed in
with the same Apple ID or Google Play account. Use the "Restore Purchases" button in the settings to
activate.
How can I request a refund?
Refunds are handled directly by the store platforms:
- Apple (iOS): Use your purchase history at reportaproblem.apple.com.
- Google Play (Android): Use the "Refund" button in the Play Store (typically
within 15 minutes) or manage via your account settings.
Technical & Usage
Does Marine Navigation use my phone’s GPS?
Yes. Marine Navigation uses your device’s built-in GPS. External instruments
such as AIS or NMEA inputs are not supported at this time.
Does Marine Navigation drain the battery?
Like any navigation app, continuous GPS use and a bright screen will reduce
battery life. For longer trips, we recommend using a boat charger or a power bank. You can also
reduce GPS update frequency in Settings to save power.
What happens if I reinstall the app? Will I lose my data?
Your routes, waypoints, and settings are stored on your device. If you delete
the app completely, local data may be lost. Before reinstalling or changing devices, export your
routes/waypoints (GPX) to keep a backup.
Can I share my routes and waypoints?
Yes. You can export and share them in GPX format via email or other apps.
Offline maps, however, remain tied to your device.
Where can I find documentation?
You can find step-by-step guidance in the User Manual on our website, and video
tutorials on our YouTube channel (see the links in the Download / User Manual sections).
Legal & Safety
Is Marine Navigation legal for professional/commercial use?
Marine Navigation is a powerful navigation aid and backup tool, but it cannot
replace official certified charts required for professional or commercial operations. Always carry
official, up-to-date nautical charts for your area and navigate responsibly.
Does Marine Navigation replace official charts?
No. This app is designed as a navigational aid and backup. Good seamanship
requires always carrying official, up-to-date nautical charts for your area. The skipper is solely
responsible for the safety of the vessel.
Support
Still have questions or ideas?
Safety Notice: This app is for navigation reference and backup only. Always preserve safety at sea by
carrying official nautical charts.