SeaNav 4+

Marine Charts and Navigation

Pocket Mariner Ltd.

Designed for iPad

    • 4.3 • 195 Ratings
    • Free
    • Offers In-App Purchases


Explore, plan and navigate your boating trips in real time and outstanding high-resolution using digital charts derived from the latest NOAA and UKHO data providing coverage across the US and Europe (US, CA, UK & IE, DE, FR, NL, BE, DK, NO,ES,HR,PT). Raster charts for US, NZ, FI & EE.

- Vector charts - all buoys, lights etc. are tappable
- Seamless fast panning and zoom across charts
- Route Planning and real-time tracking
- North up and course up displays
- Offline charts
- Configurable layers
- Built-in tutorial mode with full features including charts, AIS, AR & wind
- Tides, Streams & Weather
- Live AIS Ship positions and collision alarm (IAP)
- Import and share routes and POIs in GPX and KML formats via email and Dropbox
- Live Augmented Reality camera view (IAP) plus FLIRONE® night vision support.
- Includes free Apple Watch app with Nav,Waypoint,Wind,AIS faces.
- NMEA Depth, Wind Speed and Direction
- Real time local wind feed (IAP)

The free version includes all navigation and trip planning tools. High resolution vector charts are available by In App Purchase (IAP) including updates for 12 months.

Vector charts provide many advantages over traditional raster charts. Buoys, Lights, Bridges, Depth Contours, Depth Soundings, Rocks, Anchorage areas, NOAA Weather Buoys etc. are all selectable and have real time distance, bearing and detail information. Turn off layers to de-clutter the display and only show what is important at the time. Tides, moon and sun times and weather are also all available at your fingertips.

In-app tools let you measure distances and bearings and record waypoints on routes to sail. When you are out at sea, the app’s Sailing HUD shows your position on the route, Course over ground (COG), Speed over ground (SOG), Vector Made Good (VMG), Estimated Time of Arrival (ETA), Distance and bearing to next Waypoint. Waypoint reached alerts, auto-routing to the next waypoint and flashing collision alerts (with AIS).

Unique AR view mode (IAP) allows you to view buoys, lights, ships, waypoints, route and track overlaid on your iPhone or iPad live camera view. With "AR LockOn" you can select a target on the chart and then be guided to it in the AR camera view. You can also see at night and in the fog with the FLIRONE Infra-red camera.

External NMEA GPS, AIS and Wind data over Wifi.

GPS only required for real time route navigation. Optional Real time AIS, Tides and Weather information require an active internet connection.

WiFi-only iPad or iPods will need an external GPS receiver for navigation.

Please note that continued use of GPS running in the background can dramatically decrease battery life.

Our in-app purchases are 1 year subscriptions, which automatically renew at the end of the subscription period unless auto-renew is turned off at least 24-hours before the end of the current period. Payment will be charged to your iTunes Account at confirmation of purchase, and will be charged for renewal within 24-hours prior to the end of the current period. Pricing for our 1 year US Charts update subscription is $19.99.

Subscriptions may be managed by the iTunes account holder and auto-renewal may be turned off by going to Account Settings after purchase. 
No cancellation of the current subscription is allowed during active subscription period.

NOTICES: This product has been derived in part from material obtained from the UK Hydrographic Office with the permission of the UK Hydrographic Office, Her Majesty’s Stationery Office.” “© British Crown Copyright, [2012]. All rights reserved.

The UK Hydrographic Office (UKHO) and its licensors make no warranties or representations, express or implied, with respect to this product. The UKHO and its licensors have not verified the information within this product or quality assured it.

Terms of Use:

Privacy Policy:


What’s New

Version 5.4.9

UI Improvements and fixes
-Quick Link to Boat Beacon button added (top right) - Boat Beacon also has a quick link back to SeaNav
-Request to launch Boat Beacon on start sailing now defaulted to not show( re-enable in Advanced settings or just use the new Boat Beacon quick link button).
-iPhone landscape mode now displays current time again
-iPad instruments side panel in landscape displays time
-SART TEST targets no longer fire an alarm
-Weather map now scrolls up and down
-French . German & Spanish language support added

Ratings and Reviews

4.3 out of 5
195 Ratings

195 Ratings

Simeoniii ,

Excellent program

Had this installed for a while and I’m now beginning to use it. Integrates well with my Wind Instrument. The building of routes and importing waypoints stumped me but after reading the Help document.

After working with the app and companion app Boat Beacon, I am really impressed. Excellent response from help desk/support and they want user feedback to guide their future app updates. I am changing my rating from 4 to 5 stars.

Flip Flop Navy ,

Intuitive and accurate

I have had SeaNav for a year now and have learned to trust it. It is just as accurate as any high dollar system and is easy to use.

PennGreen ,

Wouldn’t sail without it!

Love knowing what went buy in the middle of the night when anchored. And what’s coming by before I can see it!

Catalina 380
Hull 123

App Privacy

The developer, Pocket Mariner Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

Boat Watch - Ship Tracking
Boat Beacon
SeaNav US
Compass Eye Bearing Compass
Boat Watch Pro
SeaNav NP

You Might Also Like

Marine Navigation Lite
AIS Maps: Marine & Lake charts
WinGPS Marine
PRO CHARTS - Marine Navigation
OnCourse - boating & sailing
B&G: Companion App for Sailors