You are not logged in.
In october (v3.2 am 2016-08-27) the OpenSeaMap App was updated see also the details in the OpenStreetmap Wiki. The app was enhanced by several important features and got a new app icon.
FEATURES OF THE APP:
Free worldwide sea chart (incl. HD chart graphics)
Search for geolocations worldwide
Chartplotting with continuous tracking
Waypoints can easily be created, edited, deleted & exported
Mark locations in the chart
Zoom chart optically to fit your preferred reading size
Enter coordinates directly to be displayed in the chart
Offline caching of up to 1 million map tiles
Cleanup of chart cache data at any time
Weather overlays (Source: openportguide.de)
See on the AppStore:
OpenSeaMap on the AppStore
Greetings, Helge (Developer)
Developer of the OpenSeaMap app for iOS (iPhone, iPod & iPad)
OpenSeaMap app on the AppStore
Offline