Navionics ChartViewer: Nautical charts and sonar depth maps for boaters, online. OS Maps: Ordnance Survey maps of Great Britain for walking and planning.
| Navionics ChartViewer | OS Maps | |
|---|---|---|
| Category | Hiking, Ski & Outdoor Maps | Hiking, Ski & Outdoor Maps |
| Coverage | Worldwide | Great Britain |
| Updates | Periodically | Periodically |
| Data source | Navionics charts and community sonar logs | Ordnance Survey |
| Made by | Navionics (Garmin) | Ordnance Survey |
| Price | Free | Free + paid plan |
| Account | No account needed | Free to view, account for extras |
| On phones | Phone app available | Phone app available |
| Map view | Flat map | Flat map |
| Visits from ColorfulMaps | 0 | 0 |
| Open map | Open map |
What you can do with Navionics ChartViewer
- Nautical charts worldwide
- Community sonar depth contours
- Marinas and points of interest
What you can do with OS Maps
- OS Explorer and Landranger maps (subscription)
- Plan and share routes
- Community routes
- 3D fly-through
Summary based on public information. Check each map's website for current features and prices.