The yearly subscription extends this for another year or gives you this initially for a year.
Remember this is not a government program, but a private industry.
To renew the subscriptions are 4.99 for US and 7.99 US and Canada
Included with Navionics+
DOCK-TO-DOCK AUTOROUTING
Dock-to-dock Autorouting, a unique breakthrough in boating navigation, quickly creates detailed routes even through narrow passages and channels, based on chart data and navigation aids. Choose your destination by selecting a point of interest, entering a lat/long or by tapping on the map and your route is calculated. You can see estimated fuel consumption, distance, and ETA. Tap Route>Automatic Route to begin! Learn more!
NAVIGATION MODULE
Advanced route planning with ETA, distance to arrival, heading to WP, fuel consumption and more! Tap Route>Manual Route. Watch the video on Apple and Android.
ADVANCED MAP OPTIONS
Useful new tools to control the display of your map. Tap Menu>Map Options. Watch the video on Apple and Android.
PLOTTER SYNC
Plotter Sync lets you connect wirelessly to a compatible Raymarine, Lowrance, Simrad or B&G plotter to transfer routes and markers, update charts
WEATHER & TIDES
Get detailed weather forecasts and weather buoy data. See hourly and daily forecasts, wind conditions, tides, currents, temperature, air pressure, visibility, precipitation and sun/moon cycles. In addition, NOAA Weather Buoy data can include wind speed, gust and direction, air pressure, water temperature, wave height and other relevant marine info. Watch this video for more information.
TIMELINE
Enjoy looking back at your trips in the track Timeline where you can see photos taken while tracking, POIs and Navionics panoramic images. Available on iPhone/iPad only.